malacostomous

== English == === Etymology === From malaco- +‎ stoma +‎ -ous. === Adjective === malacostomous (comparative more malacostomous, superlative most malacostomous) (zoology, archaic) Having soft jaws without teeth. === References === “malacostomous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.