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of the genus Culex and allied genera. The females have a proboscis containing, within the sheathlike labium, six fine, sharp, needlelike organs with which they puncture the skin of man and animals to suck the blood. These bites, when numerous, cause, in many persons, considerable irritation and swelling, with some pain…

fasten the mouth of, so as to prevent biting or eating; hence, figuratively, to bind; to sheathe; to restrain from speech or action. "My dagger muzzled." Shak. Thou shalt not muzzle the ox when he treadeth out the corn. Deut. xxv. 4.

ells, and resembling, if not identical with, the substance (myelin) forming the medullary sheaths of nerve fibers.

The delicate outer sheath of a nerve fiber; the primitive sheath.

A substance, resembling keratin, present in nerve tissue, as in the sheath of the axis cylinder of medullated nerve fibers. Like keratin it resists the action of most chemical agents, and by decomposition with sulphuric acid yields leucin and tyrosin.

Not medullated; (Anat.) without a medulla or marrow, or without a medullary sheath; as, a nonmedullated nerve fiber.

work with the nose, like a swine in the mud. And nuzzling in his flank, the loving swine Sheathed, unaware, the tusk in his soft groin. Shak. He charged through an army of lawyers, sometimes . . . nuzzling like an eel in the mud. Arbuthnot.

A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; -- nearly the same as demulcent. Forsyth.

A kind of sheath formed by two stipules united round a stem.

Provided with ochrea, or sheathformed stipules, as the rhubarb, yellow dock, and knotgrass.

The connective tissue sheath which surrounds a muscle, and sends partitions inwards between the bundles of muscular fibers.

The connective tissue sheath which surrounds a bundle of nerve fibers. See Epineurium, and Neurilemma.

a meridian. -- Primitive rocks (Geol.), primary rocks. See under Primary. -- Primitive sheath. (Anat.) See Neurilemma. -- Primitive streak or trace (Anat.), an opaque and thickened band where the mesoblast first appears in the vertebrate blastoderm.

the under parts, the sides of the head and throat, and the buttocks, are white. The horny sheath of the horns is shed annually. Called also cabrée, cabut, prongbuck, and pronghorned antelope.

A case or sheath for arrows to be carried on the person. Reside him hung his bow And quiver, with three-bolted thunder stored. Milton.

Sheathed, as in a quiver. "Whose quills stand quivered at his ear." Pope.

The sheath of the upper mandible of a bird.

The very thin transparent and apparently homogenous sheath which incloses a striated muscular fiber; the myolemma.

The case in which the blade of a sword, dagger, etc., is kept; a sheath. Nor in thy scabbard sheathe that famous blade. Fairfax. Scabbard fish (Zoöl.), a long, compressed, silver-colored tænioid fish (Lepidopus caudatus, or argyreus), found on the European coasts, and more abundantly about New Zealand, where it is call…

The substance of the medullary sheath.