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y called platina. Platinum black (Chem.), a soft, dull black powder, consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer. -- Platinum lamp (Elec.), a kind of incandescent lamp of which the luminous…

ritoneum; -- used especially in the case of those animals in which the body cavity is not divided.

, slender moths, belonging to the family Pterophoridæ. Most of them have the wings deeply divided into two or more plumelike lobes. Some species are injurious to the grapevine. -- Plume nutmeg (Bot.), an aromatic Australian tree (Atherosperma moschata), whose numerous carpels are tipped with long plumose persistent st…

Deeply divided into several portions.

Subdivided into many distinct subordinate parts, which, however, not being jointed to the petiole, are not true leaflets; -- said of leaves. Henslow.

which each competitor pays a certain sum for every shot he makes, the net proceeds being divided among the winners.

That which is divided off or separated, as a part from a whole; a separated part of anything.

A division; a divided share. To make pourparty, to divide and apportion lands previously held in common.

.), a factor which is a prime number. -- Prime figure (Geom.), a figure which can not be divided into any other figure more simple than itself, as a triangle, a pyramid, etc. -- Prime meridian (Astron.), the meridian from which longitude is reckoned, as the meridian of Greenwich or Washington. -- Prime minister, the…

of geometrical ratios; or a relation among quantities such that the quotient of the first divided by the second is equal to that of the third divided by the fourth; -- called also geometrical proportion, in distinction from arithmetical proportion, or that in which the difference of the first and second is equal to the…

Capable of being prorated, or divided proportionately. [U.S.]

ice, and also by the hydrolytic action of boiling dilute acids on proteids. Proteoses are divided into the two groups, the primary and secondary proteoses.

A member of one of the ten sections into which the Athenian senate of five hundred was divided, and to each of which belonged the presidency of the senate for about one tenth of the year.

A genus of large marine gastropods having the outer border of the lip divided into lobes; -- called also scorpion shell.

cess (Anat.), a process projecting downward from either side of the sphenoid bone, in man divided into two plates, an inner and an outer. The posterior nares pass through the space, called the pterygoid fossa, between the processes.

The first and undivided part of the aortic trunk in the amphibian heart. -- Py*lan"gi*al, a.

r, as a heated mixture of alum, potash, and charcoal, or a mixture of charcoal and finely divided lead.

One of the four parts into which a plane is divided by the coördinate axes. The upper right-hand part is the first quadrant; the upper left-hand part the second; the lower left-hand part the third; and the lower right-hand part the fourth quadrant.

The great extensor muscle of the knee, divided above into four parts which unite in a single tendon at the knee.

Divided, or deeply cleft, into four parts; as, a quadrifid perianth; a quadrifid leaf.