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ed tissues. Passive congestion (Med.), congestion due to obstruction to the return of the blood from the affected part. -- Passive iron (Chem.), iron which has been subjected to the action of heat, of strong nitric acid, chlorine, etc. It is then not easily acted upon by acids. -- Passive movement (Med.), a movement…

orn of the Egyptians, passed over the houses of the Israelites which were marked with the blood of a lamb.

Born in the patrician file of society. Sir W. Scott. His horse's hoofs wet with patrician blood. Addison.

Smallnes of quantity; exiguity; insufficiency; as, paucity of blood. Sir T. Browne.

ease of the silkworm, characterized by the presence of minute vibratory corpuscles in the blood.

Around the blood vessels; as, perivascular lymphatics.

Small crimson, purple, or livid spots, like flea-bites, due to extravasation of blood, which appear on the skin in malignant fevers, etc.

To let blood from by opening a vein; to bleed. [R.] Howell.

The act or practice of opening a vein for letting blood, in the treatment of disease; venesection; bloodletting.

One of the four humors of which the ancients supposed the blood to be composed. See Humor. Arbuthnot.

A mixture of starch and glycerin, used as a substitute for ointments. U. S. Disp. Blood plasma (Physiol.), the colorless fluid of the blood, in which the red and white blood corpuscles are suspended. -- Muscle plasma (Physiol.), the fundamental part of muscle fibers, a thick, viscid, albuminous fluid contained within…

A proteid body, separated by some physiologists from blood plasma. It is probably identical with fibrinogen.

or reciprocating motion; to operate; to act; as, the fountain plays. The heart beats, the blood circulates, the lungs play. Cheyne.

Overfullness; especially, excessive fullness of the blood vessels; repletion; that state of the blood vessels or of the system when the blood exceeds a healthy standard in quantity; hyperæmia; -- opposed to anæmia.

Haeving a full habit of body; characterized by plethora or excess of blood; as, a plethoric constitution; -- used also metaphorically. "Plethoric phrases." Sydney Smith. "Plethoric fullness of thought." De Quincey.

he size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb. -- Pleth`ys*mo*graph"ic, a.

dy, by means of the plethysmograph, of the variations in size of a limb, and hence of its blood supply.

To practice or perform with diligence; to work at. Their bloody task, unwearied, still they ply. Waller.

An irregular form of corpuscle found in the blood in cases of profound anæmia, probably a degenerated red blood corpuscle.

o soil; to desecrate; -- used of physical or moral defilement. The land was polluted with blood. Ps. cvi. 38 Wickedness . . . hath polluted the whole earth. 2 Esd. xv. 6.