|obligate (ŏb'lĭ-gĭt, -gāt') Pronunciation Key
Capable of existing only in a particular environment or by assuming a particular role. An obligate aerobe, such as certain bacteria, can live only in the presence of oxygen. An obligate parasite cannot survive independently of its host. Compare facultative.
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.