opacity(noun) the phenomenon of not permitting the passage of electromagnetic radiation. opacity, opaqueness(noun) incomprehensibility resulting from obscurity of meaning. opacity, opaqueness(noun) the quality of being opaque to a degree; the degree to which something reduces the passage of light.
â¢ OXYTOCIC DRUG (noun). The noun OXYTOCIC DRUG has 1 sense: 1. a drug that induces labor by stimulating contractions of the muscles of the uterus. Familiarity information: OXYTOCIC DRUG used as a noun is very rare. OXYTOCIC DRUG (noun). The noun OXYTOCIC DRUG has 1 sense: 1. a drug that induces labor by stimulating contractions of the muscles of the uterus. Familiarity information: OXYTOCIC DRUG used as a noun is very rare.
1 Oxytocin is a neuropeptide produced in the hypothalamus and secreted by the pituitary gland. 2  Oxytocin is released during sex, childbirth and lactation to aid reproductive functions.3  This neuropeptide exerts multiple psychological effects, influencing social behavior and emotion.t is transported to, and secreted by, the pituitary gland, which is located at the base of the brain. 1. In chemistry, oxytocin is classed as a nonapeptide (a peptide containing nine amino acids), while its biological classification is as a neuropeptide.