facultative 音标拼音: [f'ækəlt
, etɪv]
facultative adj 1 :
of or relating to the mental faculties 2 :
able to exist under more than one set of conditions ; "
a facultative parasite can exist as a parasite or a saprophyte "
[
ant : {
obligate }]
3 :
granting a privilege or permission or power to do or not do something ; "
a facultative enactment "
4 :
not compulsory ; "
facultative courses in the sciences "
Facultative \
Fac "
ul *
ta *
tive \,
a . [
L .
facultas , -
atis ,
faculty :
cf .
F .
facultatif ,
G .
fakultativ .]
1 .
Having relation to the grant or exercise faculty ,
or authority ,
privilege ,
license ,
or the like hence ,
optional ;
as ,
facultative enactments ,
or those which convey a faculty ,
or permission ;
the facultative referendum of Switzerland is one that is optional with the people and is necessary only when demanded by petition ;
facultative studies ; --
opposed to {
obligatory }
and {
compulsory },
and sometimes used with to .
[
Webster 1913 Suppl .]
2 .
Of such a character as to admit of existing under various forms or conditions ,
or of happening or not happening ,
or the like ;
specif .: (
Biol .)
Having the power to live under different conditions ;
as ,
a facultative parasite ,
a plant which is normally saprophytic ,
but which may exist wholly or in part as a parasite ; --
opposed to {
obligate }.
[
Webster 1913 Suppl .]
3 . (
Physiol .)
Pertaining to a faculty or faculties .
In short ,
there is no facultative plurality in the mind ;
it is a single organ of true judgment for all purposes ,
cognitive or practical . --
J .
Martineau .
[
Webster 1913 Suppl .]
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