refractive index (symbol: n) a measure of the extent to whi...
etiology n. 1. the causes and progress of a dis...
consonant 1. n. a voiced or unvoiced speech sou...
REM sleep rapid-eye-movement sleep: the stage of sleep, for...
salivary gland any of several glands located in the wall of...
D.A.R.E. acronym for Drug Abuse Resistance Education: a pro...