an algebraic system closed under an associative binary operation.
1. (in prescriptions) half an hour.
adjective, Horticulture. 1. partially hardy; able to survive moderately low temperatures: semihardy plants.
- Semiheavy water
semiheavy water (sěm’ē-hěv’ē) See under heavy water.
verb (used without object), hibernated, hibernating. 1. Zoology. to spend the winter in close quarters in a dormant condition, as bears and certain other animals. Compare estivate. 2. to withdraw or be in seclusion; retire. 3. to winter in a place with a milder climate: Each winter finds us hibernating in Florida. verb (intransitive) 1. […]