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A handle for a pen.

Any species of Pholas.

Pholad.

Any one of numerous species of marine bivalve mollusks of the genus Pholas, or family Pholadidæ. They bore holes for themselves in clay, peat, and soft rocks.

One versed in phytolithology; a paleobotanist.

The branch of science which treats of fossil plants; -- usually called paleobotany, sometimes paleophytology.

One skilled in diseases of plants.

The science of diseases to which plants are liable.

To place in the pigeonhole of a case or cabinet; hence, to put away; to lay aside indefinitely; as, to pigeonhole a letter or a report.

A place where a pin is fixed.

A pit; a pockmark.

Impure zinc oxide.

An embrasure in a ship's side. See 3d Port.

A circular hole formed in the rocky beds of rivers by the grinding action of stones or gravel whirled round by the water in what was at first a natural depression of the rock.

Relating to promorphology; as, a promorphological conception.

One versed in the science of promorphology.

Crystallography of organic forms; -- a division of morphology created by Haeckel. It is essentially stereometric, and relates to a mathematical conception of organic forms. See Tectology.

Of or pertaining to psychology. See Note under Psychic. -- Psy`cho*log"ic*al*ly, adv.

One who is versed in, devoted to, psychology.

A psychologist.