| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
obligate (ˈɒblɪˌɡeɪt) ![]() | |
| —vb | |
| 1. | to compel, constrain, or oblige morally or legally |
| 2. | (in the US) to bind (property, funds, etc) as security |
| —adj | |
| 3. | compelled, bound, or restricted |
| 4. | biology Compare facultative able to exist under only one set of environmental conditions: an obligate parasite cannot live independently of its host |
| [C16: from Latin obligāre to | |
| 'obligable | |
| —adj | |
| ob'ligative | |
| —adj | |
| 'obligator | |
| —n | |
obligate ob·li·gate (ŏb'lĭ-gĭt, -gāt')
adj.
Able to exist or survive only in a particular environment or by assuming a particular role.
| 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. |