Search the Dictionary

A segment in the hyoidean arch between the epihyal and tympanohyal.

al height from springing line to crown less than the half span; -- said of an arch; as, a segmental arch is surbased.

A seam, or impressed line, as between the segments of a crustacean, or between the whorls of a univalve shell. Glover's suture, Harmonic suture, etc. See under Glover, Harmonic, etc.

ld of a ship when she begins to curve in at the rungheads; any part of a ship shaped in a segment of a circle.

Any one of the segments of an arm of a crinoid composed of two joints so closely united that the line of union is obliterated on the outer, though visible on the inner, side.

longing to Tænia and many allied genera. The body is long, flat, and composed of numerous segments or proglottids varying in shape, those toward the end of the body being much larger and longer than the anterior ones, and containing the fully developed sexual organs. The head is small, destitute of a mouth, but furnish…

The segment of the brain next in front of the midbrain, including the thalami, pineal gland, and pituitary body; the diencephalon; the interbrain.

The proximal segment of the hind limb between the knee and the trunk. See Femur.

A division of cirripeds including those which have six thoracic segments, usually bearing six pairs of cirri. The common barnacles are examples.

the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix.

One of the lower segments in the hyoid arch, often consolidated with the body of the hyoid bone and forming one of its great horns, as in man.

extinct at the close of the Paleozoic. So named from the three lobes usually seen on each segment.

Divided nearly to the base into three segments or lobes.

Thrice pinnately cleft; -- said of a pinnatifid leaf when its segments are pinnatifid, and the subdivisions of these also are pinnatifid.

Divided into three parts or segments by incisions extending to the midrib or to the base; -- said of leaves.

That segment of the body of an insect which is between the head and abdomen, and bears the wings and legs; the thorax; the truncus.

lids including those which construct, and habitually live in, tubes. The head or anterior segments usually bear gills and cirri. Called also Sedentaria, and Capitibranchiata. See Serpula, and Sabella.

Divided about half way from the border to the base into two segments; bifid.

The proximal segment in the hyoidean arch, becoming a part of the styloid process of the temporal bone in adult man.

One of the segments of the abdomen or post-abdomen of arthropods.