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Acoustic
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AcousticHaving to do with sound and hearing.
SIMILAR TERMS--------------------------------------
Acou-
Combining form relating to hearing. As in acoustic, otoacoustic emission test, and presbyacousia.
Acoustic aphasia
See: Auditory aphasia.
Acoustic nerve
A cranial nerve concerned with hearing, balance and head position. The acoustic nerve is the 8th cranial nerve. It branches into two parts -- a cochlear part integral to hearing and a vestibular part which mediates the sense of balance and head position. Also called the vestibulocochlear nerve.
Acoustic neurinoma
A benign tumor that may develop on the hearing and balance nerves near the inner ear. The tumor results from an overproduction of Schwann cells -- small sheet-like cells that normally wrap around nerve fibers like onion skin and help support the nerves. When growth is abnormally excessive, Schwann cells bunch together, pressing against the hearing and balance nerves, often causing gradual hearing loss, tinnitus (ringing in the ears), and dizziness. If the tumor becomes large, it can interfere with the facial nerve, causing partial paralysis, and eventually press against nearby brain structures, becoming life-threatening.
Acoustic neurofibromatosis
See: Neurofibromatosis type 2.
Acoustic neuroma
A benign tumor that may develop on the hearing and balance nerves near the inner ear. The tumor results from an overproduction of Schwann cells -- small sheet-like cells that normally wrap around nerve fibers like onion skin and help support the nerves. When growth is abnormally excessive, Schwann cells bunch together, pressing against the hearing and balance nerves, often causing gradual hearing loss, tinnitus (ringing in the ears), and dizziness. If the tumor becomes large, it can interfere with the facial nerve, causing partial paralysis, and eventually press against nearby brain structures, becoming life-threatening.
PREVIOUS AND NEXT TERMS--------------------------------------
Abruption
A sudden breaking off or away. Abruption of the placenta (abruptio placentae) is the premature separation of the placenta from the wall of the uterus, a potentially very serious situation for the mother and baby.
Abs
Commonly used slang for the abdominal muscles, the muscles running up and down in the abdominal wall. The "abs" contain the rectus abdominus muscle, "rectus" meaning straight."
Abstinence
To hold back or restrain. For example, to refrain from the use of drugs or alcohol, or from having sexual intercourse.
Acclimation
The process of getting used to a new climate or altitude.
Acidosis
An abnormal condition in the body in which excessive acid lowers the pH of the blood and body tissues.
Acoustic
Acromegaly
A condition that occurs when the pituitary gland produces too much growth hormone. In adults, this can cause overgrowth of bones that occurs in smaller bones, such as those in the jaw, hands and feet. In children or teenagers, this can cause giantism.
Actinic keratoses
Scaly, pink, gray or tan patches or bumps on the face or scalp, or on the back of the hands. Occur mostly on people who have light skin that has been damaged by the sun.
Acute
1. Of short course. 2. Severe, but of a short duration. Not chronic.
Addiction
Strong dependence or habitual use of a substance or practice, despite the negative consequences of its use.
Adenoids
Glandular tissue in the back of the throat that may swell, especially during childhood, obstruct breathing and speaking, and lead to ear infections.
SIMILAR TERMS--------------------------------------
Acou-
Combining form relating to hearing. As in acoustic, otoacoustic emission test, and presbyacousia.
Acoustic aphasia
See: Auditory aphasia.
Acoustic nerve
A cranial nerve concerned with hearing, balance and head position. The acoustic nerve is the 8th cranial nerve. It branches into two parts -- a cochlear part integral to hearing and a vestibular part which mediates the sense of balance and head position. Also called the vestibulocochlear nerve.
Acoustic neurinoma
A benign tumor that may develop on the hearing and balance nerves near the inner ear. The tumor results from an overproduction of Schwann cells -- small sheet-like cells that normally wrap around nerve fibers like onion skin and help support the nerves. When growth is abnormally excessive, Schwann cells bunch together, pressing against the hearing and balance nerves, often causing gradual hearing loss, tinnitus (ringing in the ears), and dizziness. If the tumor becomes large, it can interfere with the facial nerve, causing partial paralysis, and eventually press against nearby brain structures, becoming life-threatening.
Acoustic neurofibromatosis
See: Neurofibromatosis type 2.
Acoustic neuroma
A benign tumor that may develop on the hearing and balance nerves near the inner ear. The tumor results from an overproduction of Schwann cells -- small sheet-like cells that normally wrap around nerve fibers like onion skin and help support the nerves. When growth is abnormally excessive, Schwann cells bunch together, pressing against the hearing and balance nerves, often causing gradual hearing loss, tinnitus (ringing in the ears), and dizziness. If the tumor becomes large, it can interfere with the facial nerve, causing partial paralysis, and eventually press against nearby brain structures, becoming life-threatening.
PREVIOUS AND NEXT TERMS--------------------------------------
Abruption
A sudden breaking off or away. Abruption of the placenta (abruptio placentae) is the premature separation of the placenta from the wall of the uterus, a potentially very serious situation for the mother and baby.
Abs
Commonly used slang for the abdominal muscles, the muscles running up and down in the abdominal wall. The "abs" contain the rectus abdominus muscle, "rectus" meaning straight."
Abstinence
To hold back or restrain. For example, to refrain from the use of drugs or alcohol, or from having sexual intercourse.
Acclimation
The process of getting used to a new climate or altitude.
Acidosis
An abnormal condition in the body in which excessive acid lowers the pH of the blood and body tissues.
Acoustic
Acromegaly
A condition that occurs when the pituitary gland produces too much growth hormone. In adults, this can cause overgrowth of bones that occurs in smaller bones, such as those in the jaw, hands and feet. In children or teenagers, this can cause giantism.
Actinic keratoses
Scaly, pink, gray or tan patches or bumps on the face or scalp, or on the back of the hands. Occur mostly on people who have light skin that has been damaged by the sun.
Acute
1. Of short course. 2. Severe, but of a short duration. Not chronic.
Addiction
Strong dependence or habitual use of a substance or practice, despite the negative consequences of its use.
Adenoids
Glandular tissue in the back of the throat that may swell, especially during childhood, obstruct breathing and speaking, and lead to ear infections.
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This dictionary contains 19186 terms.
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