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| This glossary contains: 19186 medical terms |
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Adductor spasmodic dysphonia
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Adductor spasmodic dysphoniaA disorder in which sudden muscle spasms cause the vocal folds (or vocal cords) to slam together. See: spasmodic dysphonia.
RELATED TERMS--------------------------------------
Muscle
Tissue made up of bundles of long, slender cells that contract when stimulated.
Dysphonia
Altered voice production.
SIMILAR TERMS--------------------------------------
Adducted thumbs with mental retardation
"A syndrome with the following characteristic features:
Adduction
"Movement of a limb toward the midline of the body. The opposite of adduction is abduction. An adductor muscle pulls toward the midline of the body. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. From the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."""
Adductor muscle
"Any muscle that pulls a body part toward the midline. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. The word ""adductor"" comes from the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."" The opposite of ""adductor"" is ""abductor."" An adductor muscle opposes an abductor muscle."
PREVIOUS AND NEXT TERMS--------------------------------------
Addisonian anemia
A blood disorder caused by a lack of vitamin B12. Patients who have this disorder do not produce the substance in the stomach that allows the body to absorb vitamin B12. This substance is called intrinsic factor (IF). Addisonian anemia, also called pernicious anemia (PA), is characterized by the presence in the blood of large, immature, nucleated cells (megaloblasts) that are forerunners of red blood cells. (Red blood cells, when mature, have no nucleus). It is thus a type of megaloblastic anemia.
Additive genetic effects
A mechanism of quantitative inheritance such that the combined effects of genetic alleles at two or more gene loci are equal to the sum of their individual effects.
Adducted thumbs with mental retardation
"A syndrome with the following characteristic features:
Adduction
"Movement of a limb toward the midline of the body. The opposite of adduction is abduction. An adductor muscle pulls toward the midline of the body. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. From the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."""
Adductor muscle
"Any muscle that pulls a body part toward the midline. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. The word ""adductor"" comes from the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."" The opposite of ""adductor"" is ""abductor."" An adductor muscle opposes an abductor muscle."
Adductor spasmodic dysphonia
ADE
Adverse drug event. See: Adverse reaction.
Aden-
See: Adeno-.
Adenine (A)
"One member of the A-T (adenine-thymine) base pair in DNA. The other base pair in DNA is G-C (guanine-cytosine). Each base pair forms a ""rung of the DNA ladder."" A DNA nucleotide is made of a molecule of sugar, a molecule of phosphoric acid, and a molecule called a base. The bases are the ""letters"" that spell out the genetic code. In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In DNA base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine. Adenine is also one of the bases in RNA. There it always pairs with uracil (U). The base pairs in RNA are therefore A-U and G-C."
Adeno-
"Prefix referring to a gland, as in adenoma and adenopathy. From the Greek aden meaning originally ""an acorn"" and later ""a gland"" in the form of an acorn. Before a vowel, adeno- becomes aden-, as in adenitis (inflammation of a gland)."
Adenoid cystic carcinoma
"A type of cancer that most often develops in the salivary glands of the head and neck. It may arise in other sites such as the skin, lacrimal gland, trachea, breast, cervix and prostate. Adenoid cystic carcinoma (ACC) has a characteristic appearance under the microscope. Abnormal ""nests"" or cords of certain cells (epithelial cells) can be seen to surround or infiltrate ducts and glandular structures. These structures are typically filled with a mucous-like material or contain abnormal fibrous membranes (hyaline membranes). ACC is an unusual tumor. It is slow-growing but relentless. It tends to be locally invasive and infiltrate the ""sheaths"" or coatings surrounding nerve fibers (perineural spaces). ACC often recurs years later at the site where the tumor first arose or it may metastasize. Unlike most carcinomas, it seldom metastasizes to nearby lymph nodes but rather to distant sites. The lung is the most common site of metastasis, with the liver second. Bone metastases indicate a poor prognosis . Treatment usually involves surgery to resect (remove) the tumor. Postoperative radiotherapy may help prevent local recurrence. Chemotherapy may slow the tumor but no chemotherapy has yet been found that is effective in destroying it."
RELATED TERMS--------------------------------------
Muscle
Tissue made up of bundles of long, slender cells that contract when stimulated.
Dysphonia
Altered voice production.
SIMILAR TERMS--------------------------------------
Adducted thumbs with mental retardation
"A syndrome with the following characteristic features:
Adduction
"Movement of a limb toward the midline of the body. The opposite of adduction is abduction. An adductor muscle pulls toward the midline of the body. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. From the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."""
Adductor muscle
"Any muscle that pulls a body part toward the midline. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. The word ""adductor"" comes from the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."" The opposite of ""adductor"" is ""abductor."" An adductor muscle opposes an abductor muscle."
PREVIOUS AND NEXT TERMS--------------------------------------
Addisonian anemia
A blood disorder caused by a lack of vitamin B12. Patients who have this disorder do not produce the substance in the stomach that allows the body to absorb vitamin B12. This substance is called intrinsic factor (IF). Addisonian anemia, also called pernicious anemia (PA), is characterized by the presence in the blood of large, immature, nucleated cells (megaloblasts) that are forerunners of red blood cells. (Red blood cells, when mature, have no nucleus). It is thus a type of megaloblastic anemia.
Additive genetic effects
A mechanism of quantitative inheritance such that the combined effects of genetic alleles at two or more gene loci are equal to the sum of their individual effects.
Adducted thumbs with mental retardation
"A syndrome with the following characteristic features:
Adduction
"Movement of a limb toward the midline of the body. The opposite of adduction is abduction. An adductor muscle pulls toward the midline of the body. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. From the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."""
Adductor muscle
"Any muscle that pulls a body part toward the midline. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together. The word ""adductor"" comes from the Latin prefix ""ad"" meaning ""toward"" + ""ducere"" meaning ""to draw or lead"" = ""to draw toward."" The opposite of ""adductor"" is ""abductor."" An adductor muscle opposes an abductor muscle."
Adductor spasmodic dysphonia
ADE
Adverse drug event. See: Adverse reaction.
Aden-
See: Adeno-.
Adenine (A)
"One member of the A-T (adenine-thymine) base pair in DNA. The other base pair in DNA is G-C (guanine-cytosine). Each base pair forms a ""rung of the DNA ladder."" A DNA nucleotide is made of a molecule of sugar, a molecule of phosphoric acid, and a molecule called a base. The bases are the ""letters"" that spell out the genetic code. In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In DNA base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine. Adenine is also one of the bases in RNA. There it always pairs with uracil (U). The base pairs in RNA are therefore A-U and G-C."
Adeno-
"Prefix referring to a gland, as in adenoma and adenopathy. From the Greek aden meaning originally ""an acorn"" and later ""a gland"" in the form of an acorn. Before a vowel, adeno- becomes aden-, as in adenitis (inflammation of a gland)."
Adenoid cystic carcinoma
"A type of cancer that most often develops in the salivary glands of the head and neck. It may arise in other sites such as the skin, lacrimal gland, trachea, breast, cervix and prostate. Adenoid cystic carcinoma (ACC) has a characteristic appearance under the microscope. Abnormal ""nests"" or cords of certain cells (epithelial cells) can be seen to surround or infiltrate ducts and glandular structures. These structures are typically filled with a mucous-like material or contain abnormal fibrous membranes (hyaline membranes). ACC is an unusual tumor. It is slow-growing but relentless. It tends to be locally invasive and infiltrate the ""sheaths"" or coatings surrounding nerve fibers (perineural spaces). ACC often recurs years later at the site where the tumor first arose or it may metastasize. Unlike most carcinomas, it seldom metastasizes to nearby lymph nodes but rather to distant sites. The lung is the most common site of metastasis, with the liver second. Bone metastases indicate a poor prognosis . Treatment usually involves surgery to resect (remove) the tumor. Postoperative radiotherapy may help prevent local recurrence. Chemotherapy may slow the tumor but no chemotherapy has yet been found that is effective in destroying it."
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This dictionary contains 19186 terms.
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