(biology, chiefly historical) The theory that the species alive today are identical to those of the past and that evolution does not happen.

Third-person singular simple present indicative form of fixate

plural of fixer

(anatomy) The "fixed cheek" cephalic shell surrounding glabella inside of facial sutures.

plural of fixigena

(archaic) third-person singular simple present indicative form of fix

(informal) A fixed-gear bicycle.

Obsolete form of vixen.

plural of fixie

plural of fixedness