preopercular

noun 0.931

preoperculum

noun 0.907

operculum

noun 0.731

operculate

noun 0.658

pre-op

noun 0.604

preoperative

noun 0.598

oper

noun 0.554

opusculum

noun 0.540

pectoral fin

noun 0.537

postorbital

noun 0.534

operative

noun 0.529

preocular

noun 0.526

epibranchial

noun 0.522

actinopterygian

noun 0.522

postoperative

noun 0.519

placoderm

noun 0.511

odontophore

noun 0.506

surfperch

noun 0.502

branchial arch

noun 0.501