ingredient, fixings -- (food that is a component of a mixture in cooking; "the recipe lists all the fixings for a salad")
fixings, trimmings -- (the accessories that normally accompany (something or some activity); "an elaborate formal dinner with all the fixings"; "he bought a Christmas tree and trimmings to decorate it")
fastener, fastening, holdfast, fixing -- (restraint that attaches to something or holds something in place)
neutering, fixing, altering -- (the sterilization of an animal; "they took him to the vet for neutering")
fixation, fixing -- ((histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body)