Definition of vertebra

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Vertebra (n.) One of the central ossicles in each joint of the arms of an ophiuran.

Lern More About Vertebra

Peristome :: Peristome (n.) The membrane surrounding the mouth of an invertebrate animal.
Predorsal :: Predorsal (a.) Situated in front of the back; immediately in front, or on the ventral side the dorsal part of the vertebral column..
Bird :: Bird (n.) A warm-blooded, feathered vertebrate provided with wings. See Aves..
Epichordal :: Epichordal (a.) Upon or above the notochord; -- applied esp. to a vertebral column which develops upon the dorsal side of the notochord, as distinguished from a perichordal column, which develops around it..
Splanchno-skeleton :: Splanchnopleure (n.) The inner, or visceral, one of the two lamellae into which the vertebrate blastoderm divides on either side of the notochord, and from which the walls of the enteric canal and the umbilical vesicle are developed. See Somatopleure..
Vulva :: Vulva (n.) The orifice of the oviduct of an insect or other invertebrate.
Neuropodous :: Neuropodous (a.) Having the limbs on, or directed toward, the neural side, as in most invertebrates; -- opposed to haemapodous..
Coccyx :: Coccyx (n.) The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebrae more or less consolidated.
Retinophora :: Retinophora (n.) One of group of two to four united cells which occupy the axial part of the ocelli, or ommatidia, of the eyes of invertebrates, and contain the terminal nerve fibrillae. See Illust. under Ommatidium..
Episternum :: Episternum (n.) A median bone connected with the sternum, in many vertebrates; the interclavicle..
Spermatheca :: Spermatheca (n.) A small sac connected with the female reproductive organs of insects and many other invertebrates, serving to receive and retain the spermatozoa..
Enteropneusta :: Enteropneusta (n. pl.) A group of wormlike invertebrates having, along the sides of the body, branchial openings for the branchial sacs, which are formed by diverticula of the alimentary canal. Balanoglossus is the only known genus. See Illustration in Appendix..
Rachidian :: Rachidian (a.) Of or pertaining to the rachis; spinal; vertebral. Same as Rhachidian.
Scale :: Scale (n.) One of the small scalelike structures covering parts of some invertebrates, as those on the wings of Lepidoptera and on the body of Thysanura; the elytra of certain annelids. See Lepidoptera..
Axis :: Axis (n.) Also used of the body only of the vertebra, which is prolonged anteriorly within the foramen of the first vertebra or atlas, so as to form the odontoid process or peg which serves as a pivot for the atlas and head to turn upon..
Vertebre :: Vertebre (n.) A vertebra.
Neuro-central :: Neuro-central (a.) Between the neural arch and the centrum of a vertebra; as, the neurocentral suture..
Coelenterata :: Coelenterata (n. pl.) A comprehensive group of Invertebrata, mostly marine, comprising the Anthozoa, Hydrozoa, and Ctenophora. The name implies that the stomach and body cavities are one. The group is sometimes enlarged so as to include the sponges..
Procoelia :: Procoelia (n. pl.) A division of Crocodilia, including the true crocodiles and alligators, in which the dorsal vertebrae are concave in front..
Homologous :: Homologous (a.) Being of the same typical structure; having like relations to a fundamental type to structure; as, those bones in the hand of man and the fore foot of a horse are homologous that correspond in their structural relations, that is, in their relations to the type structure of the fore limb in vertebrates..
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