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Having the basal joints of the legs converted into jaws.

The basal thickened portion of the anterior wings of certain hemiptera.

aving the shape of an egg, or of the longitudinal sectior of an egg, with the broader end basal. Gray.

Having the basal part produced around the stem; -- said of leaves which the stem apparently passes directory through.

The basal portion, or two proximal and more or less consolidated segments, of an appendage of a crustacean.

n. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc.

Shaped like an arrowhead; triangular, with the two basal angles prolonged downward.

The long basal joint of the antennæ of an insect.

in equal proportions. -- Secondary coverts (Zoöl.), the longer coverts which overlie the basal part of the secondary quills of a bird. See Illust. under Bird. -- Secondary crystal (Min.), a crystal derived from one of the primary forms. -- Secondary current (Elec.), a momentary current induced in a closed circuit by…

Forming compound groups or colonies by budding from basal processes or stolons; as, the social ascidians. Social science, the science of all that relates to the social condition, the relations and institutions which are involved in man's existence and his well- being as a member of an organized community; sociology. It…

The narrow basal portion of the abdomen of a hymenopterous insect.

The basal portion of the body of one of the Pennatulacea, or of a gorgonian.

tance or body; as, the structure of a rock or a mineral; the structure of a sentence. It [basalt] has often a prismatic structure. Dana.

The basal part of the labium of insects. It bears the mentum.

A vitreous form of basalt; -- so called because decompposable by acids and readily fusible.

ear, corresponding to the squamosal and zygoma of the lower vertebrates, and a thickened basal petrosal and mastoid portion, corresponding to the periotic and tympanic bones of the lower vertebrates.

One of the quill feathers which are borne upon the basal joint of the wing of a bird. See Illust. of Bird.

ne affords us also a touchstone for the trial of spirits. South. Irish touchstone (Min.), basalt, the stone which composes the Giant's Causeway.

dark- colored, heavy igneous rocks, including especially the feldspathic- augitic rocks, basalt, dolerite, amygdaloid, etc., but including also some kinds of diorite. Called also trap rock. Trap tufa, Trap tuff, a kind of fragmental rock made up of fragments and earthy materials from trap rocks.

The basal expansion of certain leaves, which inwraps the stem; a sheath.