Search the Dictionary

A punch-cutting tool, or machine for deepening and enlarging the spaces between the teeth of a worn saw.

One of a group of plectognath fishes (Gymnodontes), having the teeth and jaws consolidated into one or two bony plates, on each jaw, as the diodonts and tetradonts. See Bur fish, Globefish, Diodon.

A division of gastropods in which the odontophore is without teeth.

A genus of extinct oölitic fishes, having rounded teeth in several rows adapted for crushing.

To separate, as the coarse part of flax or hemp from the fine, by drawing it through the teeth of a hackle or hatchel.

ally formed of pieces of timber or metal crossing each other, and set with iron or wooden teeth. It is drawn over plowed land to level it and break the clods, to stir the soil and make it fine, or to cover seed when sown.

An instrument with long iron teeth set in a board, for cleansing flax or hemp from the tow, hards, or coarse part; a kind of large comb; -- called also hackle and heckle.

ss birds from the Cretaceous deposits of Kansas, belonging to the Odontornithes. They had teeth, and were essentially carnivorous swimming ostriches. Several species are known. See Illust. in Append.

Having the teeth differentiated into incisors, canines, and molars, as in man; -- opposed to homodont.

A screw cut on a solid whose sides are arcs of the periphery of a wheel into the teeth of which the screw is intended to work. It is named from the person who first used the form.

olonged sound like that of the letter s, by driving the breath between the tongue and the teeth; to make with the mouth a sound like that made by a goose or a snake when angered; esp., to make such a sound as an expression of hatred, passion, or disapproval. The merchants among the people shall hiss at thee. Ezek. xxvi…

eaded and fluted hardened steel cutter, resembling a tap, used in a lathe for forming the teeth of screw chasers, worm wheels, etc.

Having all the teeth similar in front, as in the porpoises; -- opposed to heterodont.

Spur gearing having teeth slanting across the face of the wheel, sometimes slanting in opposite directions from the middle.

iod. It has six broad molars, on each side of each jaw, with six incisors, and two canine teeth, both above and below. The mares usually have the canine teeth rudimentary or wanting. The horse differs from the true asses, in having a long, flowing mane, and the tail bushy to the base. Unlike the asses it has callositie…

Hunting cog (Mach.), a tooth in the larger of two geared wheels which makes its number of teeth prime to the number in the smaller wheel, thus preventing the frequent meeting of the same pairs of teeth. -- Hunting dog (Zoöl.), the hyena dog. -- Hunting ground, a region or district abounding in game; esp. (pl.), the r…

ng to, or resembling, an extinct genus of sharks (Hybodus), especially in the form of the teeth, which consist of a principal median cone with smaller lateral ones.

An extinct genus of sharks having conical, compressed teeth.

An order of marsipobranchs including the lampreys. The suckerlike moth contains numerous teeth; the nasal opening is in the middle of the head above, but it does not connect with the mouth. See Cyclostoma, and Lamprey.

Cretaceous formation. It is remarkable for having biconcave vertebræ, and sharp, conical teeth set in sockets. Its wings were well developed. It is the type of the order Odontotormæ.