Speech therapist
An older term for a speech- language pathologist.
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- Speech therapy
The treatment of speech and communication disorders. The approach used varies depending on the disorder. It may include physical exercises to strengthen the muscles used in speech (oral-motor work), speech drills to improve clarity, or sound production practice to improve articulation. See also communication disorders, speech disorders, speech-language pathologist.
- Speed
Common street name for a stimulant drug, especially for an amphetamine. Amphetamines have been used to treat hyperactivity in children, the symptoms of narcolepsy, and as an appetite suppressant and they are also frequently abused as a stimulant of the central nervous system.
- Sperm
A sperm is the male “gamete” or sex cell. It combines with the female “gamete,” called an ovum, to form a zygote. The formation process is called “fertilization.” (see ovum, zygote).
- Sperm function
The capability of sperm to function — to penetrate and fertilize the egg.
- Sperm motility
The percentage of all moving sperm in a semen sample. In a semen sample, 50% or more of the sperm should normally be moving rapidly.