Pons cerebralis see protocerebral bridge

population n. [L. populus, people] A group of individuals, especially with reference to numbers and statistics.

population density The number of a group of individuals as to unit area or volume.

population, local The individuals of a potentially interbreeding community. see deme.

porate a. [Gr. poros, channel] Bearing pores.

porcate a. [L. porca, ridge between two furrows] With longitudinal ridges and furrows.

porcellaneous, porcelanous, porcelaneous a. [It. porcel-lana, procelain] Resembling porcelain; an enameled-like surface; a nacreous luster.

pore n. [Gr. poros, channel] A minute opening or orifice; ostium.

pore canals 1. (ARTHRO: Insecta) Flat or ribbon-like twisted channels of the procuticle, running through it perpendicularly to its surface. 2. (ARTHRO: Crustacea) In Ostracoda, a small tubular passageway extending through the shell.

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