Search the Dictionary

The dorsal plate of the prothorax in insects. See Illust. of Coleoptera.

The ventral plate of the prothorax of an insect.

shes with winglike appendages. The head and most of the body were covered with large bony plates. See Placodermi.

A pterygoid bone. Pterygoid bone (Anat.), a bone which corresponds to the inner plate of the pterygoid process of the human skull, but which, in all vertebrates below mammals, is not connected with the posterior nares, but serves to connect the palatine bones with the point of suspension of the lower jaw. -- Pterygoid…

Of or pertaining to the inner pterygoid plate, or pterygoid bone, and the lower jaw.

d for different uses, and either solid, for stamping or for perforating holes in metallic plates and other substances, or hollow and sharpedged, for cutting out blanks, as for buttons, steel pens, jewelry, and the like; a die.

A piece of armor for the breast; often, an addition to, or reënforcement of. the breastplate; -- called also pesane.

One who puts or plates.

the rump, or posterior end of the backbone; -- applied especially to the posterior median plates in the carapace of chelonians.

The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.

The plate of bone which forms the posterior end of the vertebral column in most birds; the plowshare bone; the vomer. It is formed by the union of a number of the last caudal vertebræ, and supports the uropigium.

Radial plates in the calyx of a crinoid.

ma rays (see these terms). By reason of these rays they ionize gases, affect photographic plates, cause sores on the skin, and produce many other striking effects. Their degree of activity depends on the proportion of radium present, but not on its state of chemical combination or on external conditions.The radioactivi…

the price, and the like. This gentleman came to be raised to great titles. Clarendon. The plate pieces of eight were raised three pence in the piece. Sir W. Temple.

-- Raising hammer, a hammer with a rounded face, used in raising sheet metal. -- Raising plate (Carp.), the plate, or longitudinal timber, on which a roof is raised and rests.

To slash; to hack; to slice. [Obs.] Rushing of helms and riving plates asunder. Spenser.

ed States and the West Indies. -- Butterfly ray, a short-tailed American sting ray (Pteroplatea Maclura), having very broad pectoral fins. -- Devil ray. See Sea Devil. -- Eagle ray, any large ray of the family Myliobatidæ, or Ætobatidæ. The common European species (Myliobatis aquila) is called also whip ray, and mil…

The act or process of deepening worn lines in an etched plate by submitting it again to the action if acid. Fairholt.

To cut deeper, as engraved lines on a plate of metal, when the engraving has not been deep enough, or the plate has become worn in printing.

To throw or turn back the thoughts upon anything; to contemplate. Specifically: To attend earnestly to what passes within the mind; to attend to the facts or phenomena of consciousness; to use attention or earnest thought; to meditate; especially, to think in relation to moral truth or rules. We can not be said to refl…