PEARL n. 2 definitions
See under Ground. -- Pearl barley, kernels of barley, ground so as to form small, round grains. -- Pearl diver, one who dives for pearl oysters. -- Pearl edge, an edge of small loops on the side of some kinds of ribbon; also, a narrow kind of thread edging to be sewed on lace. -- Pearl eye, cataract. [R.] -- Pearl…
PEBBLE n. 2 definitions
ebble; -- so called by opticians. Pebble powder, slow-burning gunpowder, in large cubical grains. -- Scotch pebble, varieties of quartz, as agate, chalcedony, etc., obtained from cavities in amygdaloid.
POLLEN n.
ing dustlike cells of the anthers of flowers. See Flower, and Illust. of Filament. Pollen grain (Bot.), a particle or call of pollen. -- Pollen mass, a pollinium. Gray. -- Pollen sac, a compartment of an anther containing pollen, -- usually there are four in each anther. -- Pollen tube, a slender tube which issues f…
PORCUPINE n.
ated. See Diodon, and Globefish. -- Porcupine grass (Bot.), a grass (Stipa spartea) with grains bearing a stout twisted awn, which, by coiling and uncoiling through changes in moisture, propels the sharp-pointed and barbellate grain into the wool and flesh of sheep. It is found from Illinois westward. See Illustration…
PORPHYRY n.
A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles. Porphyry shell (Zoöl.), a handsome marine gastropod shell (Oliva…