Category: P
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Pain
An extremely uncomfortable signal of possible damage to the body. Subclassified as visceral (non-skeletal), or somatic (skeletal muscle or bone), and sharp (carried by A-delta fibers), or dull (carried by C-fibers). The feeling of severe discomfort which a person has when hurt. Subjective unpleasant sensation resulting from stimulation of sensory nerve endings by injury, disease,…
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Pager
A compact, pocket carried radio receiver for providing one-way communication that is used to locate or direct persons within a limited geographic area.
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Pagan
A person who is not Jewish, Christian, or Moslem.
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Padophyllin
A medication used in the treatment of genital warts acts as an irritant to cause sloughing off of the area affected by the wart virus.
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Pachynema
A midprophase stage in meiosis. In well-prepared microscope slides, the chromosomes are visible as long, paired threads.
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Pacchionian bodies
Small projections of the arachnoid tissue chiefly into the venous sinuses of the dura mater.
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Palmate venation
The major veins of a leaf originate from the same point at the base.
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Pseudo-bulb
The fleshy, bulb-like stem found on many orchids.
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Pruning
The art of cutting off parts of a plant to encourage more of the sort of growth the gardener desires, or to maintain a compact habit of growth.
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Pinch out
The operation of removing the tip of a growing shoot, usually with the fingers, to encourage lateral shoots to grow and make the plant bushier. The operation of removing the tip of a growing shoot, usually with the fingers, to encourage lateral shoots to grow and make the plant bushier.