protostoma

== English == === Etymology === From proto- +‎ Ancient Greek στόμα (stóma, “mouth”). === Noun === protostoma (plural protostomata) (embryology, obsolete) Synonym of blastopore. (zoology) In nematodes, a particular division of the stoma (mouthlike opening). ==== Derived terms ==== ==== Related terms ==== == Italian == === Etymology === From proto- +‎ stoma. === Noun === protostoma m (plural protostomi) (zoology) protostome