prostomium

/proh-stoh-mee-uhm/US // proʊˈstoʊ mi əm //UK // (prəʊˈstəʊmɪəm) //

前列腺,前列腺炎,前列腺素,前列腺体

Definitions

n.名词 noun

1
plural pro·sto·mi·a [proh-stoh-mee-uh]. /proʊˈstoʊ mi ə/.
- : the unsegmented, preoral portion of the head of certain lower invertebrates.

Prostomium wider than long, deeply bilobed, the median tentacle inserted deeply in the intervening incision.
Prostomium shortly subcordate, well rounded in front, incurved caudally.
Prostomium generally small, sometimes prolonged, but never bearing tentacles or processes.
Prostomium: The region in front of the mouth; the preoral part of the head.
Prostomium of usual general form; consisting of fourteen or fifteen rings.