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e sphenoid; relating to a bone in the base of the skull, which in the adult is often consolidated with the sphenoid; as, alisphenoid bone; alisphenoid canal.

ts, a sort of light armor from Germany, characterized by overlapping plates, arranged to slide on rivets, and thus afford great flexibility.

Without crystallization in the ultimate texture of a solid substance; uncrystallized.

A kind of annelid larva having both a dorsal and a ventral circle of special cilia.

One of the divisions of Articulata in which there are no jointed legs, as the annelids; -- opposed to Arthropoda.

To affect or be affected with anchylosis; to unite or consolidate so as to make a stiff joint; to grow together into one. [Spelt also ankylose.] Owen.

ling on another perpendicularly, or an angle of 90º (measured by a quarter circle). -- Solid angle, the figure formed by the meeting of three or more plane angles at one point. -- Spherical angle, one made by the meeting of two arcs of great circles, which mutually cut one another on the surface of a globe or sphere.…

See Annelida.

An animal resembling an annelid.

A class of articulate animals, nearly equivalent to Annelida, including the marine annelids, earthworms, Gephyrea, Gymnotoma, leeches, etc. See Annelida.

The act of annulling; abolition; invalidation.

A division of the Articulata, including the annelids and allied groups; sometimes made to include also the helminths and echinoderms. [Written also Annuloidea.]

The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it.

s. The term in also applied to similar organs on the heads of other arthropods and of annelids.

A solid hydrocarbon, C6H4.C2H2.C6H4, which accompanies naphthalene in the last stages of the distillation of coal tar. Its chief use is in the artificial production of alizarin. [Written also anthracin.]

A heavy green oil (partially solidifying on cooling), which distills over from coal tar at a temperature above 270º. It is the principal source of anthracene.

Acetanilide.

Feeding upon aphides, or plant lice, as do beetles of the family Coccinellidæ.

A large marine annelid, covered with long, lustrous, golden, hairlike setæ; the sea mouse.

An order of annelids; the Polychæta.