| HYPOSTOME | • hypostome n. (Anatomy) An appendage on the mouth of some insects, arachnids, crustaceans, and hydrozoa. • HYPOSTOME n. any of several structures associated with the mouth in different invertebrates. |
| MONOSTOME | • monostome n. A nematode of the genus Monostoma. • MONOSTOME adj. having only one mouth, pore or similar opening, also MONOSTOMOUS. |
| CYCLOSTOME | • cyclostome n. Any of various primitive jawless fish of the class Cyclostomata, such as the lamprey or hagfish. • CYCLOSTOME n. the lamprey. |
| HYPOSTOMES | • hypostomes n. Plural of hypostome. • HYPOSTOME n. any of several structures associated with the mouth in different invertebrates. |
| PROTOSTOME | • protostome n. Any animal, of the taxon Protostomia, in which the mouth is derived from the embryonic blastopore. • PROTOSTOME n. a major group of bilateral metazoan animals, that includes mollusks and annelids. |
| TELEOSTOME | • teleostome n. Any fish of the clade Teleostomi. • TELEOSTOME n. a fish with membrane bones in the skull, jaws etc., as with any ordinary fish except skates and rays. |
| CYCLOSTOMES | • cyclostomes n. Plural of cyclostome. • CYCLOSTOME n. the lamprey. |
| GNATHOSTOME | • gnathostome n. (Zoology) Any vertebrate with jaws, including amphibians, reptiles, mammals, and most modern fish, in… • GNATHOSTOME n. any vertebrate of the superclass Gnathostomata, having a mouth with jaws, including all vertebrates except the agnathans. |
| NEPHROSTOME | • nephrostome n. The funnel-shaped opening of a nephridium into the body cavity. • NEPHROSTOME n. the funnel-shaped coelomic opening of a typical nephridium. |
| PLAGIOSTOME | • plagiostome n. (Zoology) One of the Plagiostomi. • PLAGIOSTOME n. any fish families of the Plagiostomata or Plagiostomi, the cross-mouthed fishes, sharks and ray. |
| PROTOSTOMES | • protostomes n. Plural of protostome. • PROTOSTOME n. a major group of bilateral metazoan animals, that includes mollusks and annelids. |
| TELEOSTOMES | • teleostomes n. Plural of teleostome. • TELEOSTOME n. a fish with membrane bones in the skull, jaws etc., as with any ordinary fish except skates and rays. |
| DEUTEROSTOME | • deuterostome n. (Zoology) Any animal, of the subphylum Deuterostomia, in which the initial pore formed during gastrulation… • DEUTEROSTOME n. any of a major division of the animal kingdom that includes the bilaterally symmetrical animals. |
| GNATHOSTOMES | • gnathostomes n. Plural of gnathostome. • GNATHOSTOME n. any vertebrate of the superclass Gnathostomata, having a mouth with jaws, including all vertebrates except the agnathans. |
| NEPHROSTOMES | • nephrostomes n. Plural of nephrostome. • NEPHROSTOME n. the funnel-shaped coelomic opening of a typical nephridium. |
| PLAGIOSTOMES | • plagiostomes n. Plural of plagiostome. • PLAGIOSTOME n. any fish families of the Plagiostomata or Plagiostomi, the cross-mouthed fishes, sharks and ray. |
| DEUTEROSTOMES | • deuterostomes n. Plural of deuterostome. • DEUTEROSTOME n. any of a major division of the animal kingdom that includes the bilaterally symmetrical animals. |