facultative

About 0.40 uses per million words.

Meaning

1. adjective Of or relating to faculty, especially to mental faculty.
2. adjective Not obligate; optional, discretionary or elective.
3. adjective That grants permission or power to do something.
4. adjective Able to perform a particular life function, or to live generally, in more than one way.

   facultative feeder

5. adjective At which a given function is positive.

Similar words

optional enabling optionally elective voluntary discretionary interim temporary permissive reinsurance

Often followed by

anaerobes anaerobic anaerobe and parasites bacteria intracellular ponds organisms

Word family

facultatively