operculum Definition

calcareous, horny, paucispiral, preopercular, preoperculum, suboperculum, interoperculum, auriculated, metabranchial, opercular, pseudobranchia, pectinibranchiate, opercle, deltidium, gnathite, peristome, trichobranchia, phyllobranchia, parapleura, peritreme, lamellate, notopodium, gnathotheca, epipodium, deoperculate, postscutellum, epipterygoid, epicoracoid, cephalostyle, neuropodium, branchiate, sphaeridium, papulose, maxilliped, pharyngobranchial, paragnathus, exaspidean, gnathopodite, omostegite, gnathic, metasternum, tectibranchiate, opisthion, pleurobranch, megastome, phragmocone, cercopod, endaspidean, siphonium, ocellus, trochosphere, mandibulate, gnathopod, branchial arch, obelion, endosternite, acanthion, epibranchial, sclerite, holaspidean, hyostylic, hemelytron, rostrulum, multispiral, epimeron, aedeagus, epiplastron, metagastric, metapterygium, intrapetiolar, fasciole, craniometric point, premaxilla, turbinal, zygomatic process, reproductive structure, proostracum, hyoplastron, ophryon, endophragma, interstapedial, epistome, calipash, carapace, metapodium, palliobranchiate, tichorrhine, sclerodermite, sagittal suture, frontal bone, hyomandibular, pleuron, intersternal, gill slit, endostyle, finlet, platycoelian, epicranium, floscularian, rostrate,