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A small toothed wheel used by engravers to roll over a plate in order to order to produce rows of dots.

r or moisture. -- Rubber dam (Dentistry), a shield of thin sheet rubber clasped around a tooth to exclude saliva from the tooth.

more nearly allied to the rays. The flattened and much elongated snout has a row of stout toothlike structures inserted along each edge, forming a sawlike organ with which it mutilates or kills its prey.

rrowing, and many long, slender, prehensile oral tentacles. It includes Dentalium, or the tooth shells, and other similar shells. Called also Prosopocephala, and Solenoconcha.

omewhere. H. Martineau. -- Endless, or perpetual screw, a screw used to give motion to a toothed wheel by the action of its threads between the teeth of the wheel; -- called also a worm. -- Lag screw. See under Lag. -- Micrometer screw, a screw with fine threads, used for the measurement of very small spaces. -- Ri…

A shell, a whale's tooth, or the like, that is scrimshawed. [Sailor's cant, U.S.]

A sectorial, or carnassial, tooth.

ent star (Zoöl.), an ophiuran; a brittle star. -- Serpent's tongue (Paleon.), the fossil tooth of a shark; -- so called from its resemblance to a tongue with its root. -- Serpent withe (Bot.), a West Indian climbing plant (Aristolochia odoratissima). -- Tree serpent (Zoöl.), any species of African serpents belonging…

elashes, on the serratures; -- said of a leaf. -- Serrate-dentate, having the serratures toothed.

Having a toothed bill, like that of a toucan.

o a particular use; to separate from the rest; to reserve. -- To set a saw, to bend each tooth a little, every alternate one being bent to one side, and the intermediate ones to the other side, so that the opening made by the saw may be a little wider than the thickness of the back, to prevent the saw from sticking.…

of numerous species of oscinine birds of the family Laniidæ, having a strong hooked bill, toothed at the tip. Most shrikes are insectivorous, but the common European gray shrike (Lanius excubitor), the great northern shrike (L. borealis), and several others, kill mice, small birds, etc., and often impale them on thorns…

ted curve. See Plane curve, under Curve. -- Skew gearing, or Skew bevel gearing (Mach.), toothed gearing, generally resembling bevel gearing, for connecting two shafts that are neither parallel nor intersecting, and in which the teeth slant across the faces of the gears. -- Skew surface (Geom.), a ruled surface such…

An extinct genus of saber-toothed tigers. See Mach.

sister arts we came. Pope. To smite off, to cut off. -- To smite out, to knock out, as a tooth. Exod,xxi.27. -- To smite with the tongue, to reproach or upbarid; to revile. [Obs.] Jer. xviii. 18.

A tooth projecting beyond the rest; contemptuously, a broken or decayed tooth. Prior.

from flaw, defect, or decay; perfect of the kind; as, sound timber; sound fruit; a sound tooth; a sound ship.

A very large toothed whale (Physeter macrocephalus), having a head of enormous size. The upper jaw is destitute of teeth. In the upper part of the head, above the skull, there is a large cavity, or case, filled with oil and spermaceti. This whale sometimes grows to the length of more than eighty feet. It is found in th…

astropod shells of the genus Trochus, or Imperator. The shell is conical, with the margin toothed somewhat like the rowel of a spur.

ated or destroyed; a fixed or rooted remnant; a stub; as, the stump of a leg, a finger, a tooth, or a broom.