| 单词 | facultative |
| 释义 | facultative —facultatively, adv. /fak"euhl tay'tiv/, adj. 1. conferring a faculty, privilege, permission, or the power of doing or not doing something: a facultative enactment. 2. left to one's option or choice; optional: The last questions in the examination were facultative. 3. that may or may not take place; that may or may not assume a specified character. 4. Biol. having the capacity to live under more than one specific set of environmental conditions, as a plant that can lead either a parasitic or a nonparasitic life or a bacterium that can live with or without air (opposed to obligate). 5. of or pertaining to the faculties. [1810-20; < NL facultativus. See FACULTY, -IVE] |
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