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Notochord :: Notochord (n.) An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebrae and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm..

Superior :: Superior (a.) Belonging to the part of an axillary flower which is toward the main stem; posterior.

Opisthoglypha :: Opisthoglypha (n. pl.) A division of serpents which have some of the posterior maxillary teeth grooved for fangs.

Caudad :: Caudad (adv.) Backwards; toward the tail or posterior part.

Holaspidean :: Holaspidean (a.) Having a single series of large scutes on the posterior side of the tarsus; -- said of certain birds.

Swallow-tailed :: Swallowtail (n.) Any one of numerous species of large and handsome butterflies, belonging to Papilio and allied genera, in which the posterior border of each hind wing is prolongated in the form of a long lobe..

Scutelliplantar :: Scutelliplantar (a.) Having broad scutella on the front, and small scales on the posterior side, of the tarsus; -- said of certain birds..

Postnares :: Postnares (n. pl.) The posterior nares. See Nares.

Metasternum :: Metasternum (n.) The most posterior element of the sternum; the ensiform process; xiphisternum.

Metagastric :: Metagastric (a.) Of or pertaining to the two posterior gastric lobes of the carapace of crabs.

Turnus :: Turnus (n.) A common, large, handsome, American swallowtail butterfly, now regarded as one of the forms of Papilio, / Jasoniades, glaucus. The wings are yellow, margined and barred with black, and with an orange-red spot near the posterior angle of the hind wings. Called also tiger swallowtail. See Illust. under Swallowtail..

Posteriorly :: Posteriorly (adv.) Subsequently in time; also, behind in position..

Hypoptilum :: Hypoptilum (n.) An accessory plume arising from the posterior side of the stem of the contour feathers of many birds; -- called also aftershaft. See Illust. of Feather.

Trapezium :: Trapezium (n.) A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers..

Pleurotoma :: Pleurotoma (n.) Any marine gastropod belonging to Pleurotoma, and ether allied genera of the family Pleurotmidae. The species are very numerous, especially in tropical seas. The outer lip has usually a posterior notch or slit..

Tail :: Tail (n.) The terminal, and usually flexible, posterior appendage of an animal..

Lacinia :: Lacinia (n.) The posterior, inner process of the stipes on the maxillae of insects..

Hindbrain :: Hindbrain (n.) The posterior of the three principal divisions of the brain, including the epencephalon and metencephalon. Sometimes restricted to the epencephalon only..

Strepsipterous :: Strepsiptera (n. pl.) A group of small insects having the anterior wings rudimentary, and in the form of short and slender twisted appendages, while the posterior ones are large and membranous. They are parasitic in the larval state on bees, wasps, and the like; -- called also Rhipiptera. See Illust. under Rhipipter..

Postoblongata :: Postoblongata (n.) The posterior part of the medulla oblongata.

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