Any of various primitive fish of the class Agnatha that lack jaws. Living jawless fish (lampreys and hagfish) have a long, cylindrical body and a cartilaginous skeleton. The numerous extinct species were often heavily armored and are among the earliest vertebrate fossils known. Jawless fish occupy an intermediate evolutionary position between primitive chordates and jawed fish. Also called agnathan. See more at cyclostome. Compare bony fish, cartilaginous fish.
[jaw-lahyk] /ˈdʒɔˌlaɪk/ adjective 1. resembling a or pair of .
[jawp, jahp] /dʒɔp, dʒɑp/ noun, Scot. and North England. 1. . [jawp, jahp] /dʒɔp, dʒɑp/ noun, Scot. and North England. 1. a splash, spurt, or drop of water. 2. a spot or stain, as from a splash of water or mud.
- Jaw reflex
jaw reflex n. A spasmodic contraction of the temporal muscles following a downward tap on the loosely hanging mandible and seen in lesions of the corticospinal tract.
[jaw] /dʒɔ/ noun 1. either of two bones, the mandible or maxilla, forming the framework of the mouth. 2. the part of the face covering these bones, the mouth, or the mouth parts collectively: My jaw is swollen. 3. jaws, anything resembling a pair of jaws or evoking the concept of grasping and holding: the […]