D defs.my
Entry 1 sense Webster, 1913

Ostreaceous

· Os·tre·a·ceous · IPA /ˌɒstɹiˈeɪʃəs/
01 a. Of or pertaining to an oyster, or to a shell; shelly.
  1. 1.
    Of or pertaining to an oyster, or to a shell; shelly.(Zool.)
    “The crustaceous or ostreaceous body.” — Cudworth.