Category: P
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Pinocytosis
The process of engulfment of liquid by some animal cells. The process by which ac ell surrounds and takes in fluid. Engulfing process in which cells absorb or ingest nutrients and fluid before hydrolysis. Process by which certain cells (e.g., some leukocytes) engulf and take in droplets of fluid. A process wherein a cell engulfs…
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Pink eye
A highly contagious infection of the eye, usually caused by staphylococcus or pneumococcus bacteria. It is treated with antibiotics.
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Pin index
A safety attachment on the outlet valve of a gas-filled cylinder.
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Pinicillinase-producing neisseria gonorrhea (PPNG)
A strain of gonococci resistant to all forms of penicillin.
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Pineal gland
A gland in the brain that appears to regulate some body biorhythms. A gland that receives light information by way of the eyes and sympathetic nerves. It produces melatonin, serotonin, and acetylserotonin. It is located in the brain between the thalamus and the mesencephalon. Small cone-shaped gland in the brain thought to secrete melatonin; also…
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Pineal
Shaped like a pinecone. Relating to or released by the pineal gland. Pertaining to the pineal body or pineal gland, which is a structure located in the brain.
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Pimple
A small, solid elevation of the skin containing bacteria. A small swelling on the skin, containing pus. Small, inflamed, pus-containing swelling on the skin, usually due to infection of a pore obstructed with sebaceous secretions. A type of inflamed pustule (a small pus-filled blister) that is usually red at its base. A pimple may burst…
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Pimp
A man who is supported by one or more prostitutes in exchange for protection, bail money, lawyers, etc.
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Pilot program
A trial, or test, of a particular program, curriculum, etc., to determine its feasibility on a small scale or with a limited population.
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Pilomotor
Referring to something that moves the hairs of the skin. Causing movements of hairs, as the arrectores pilorum. The muscles responsible for hair movement when they contract and the nerves transmitting impulses to these muscles.