One of the minute orifices in an animal or vegetable membrane, for transpiration, absorption, etc.

A minute opening or passageway; an interstice between the constituent particles or molecules of a body; as, the pores of stones.

Small interconnecting passage through a membrane. The size and irregular path of a pore determines the removal efficiency of a membrane.

The opening in a membrane that allows components of a fluids with the same or smaller size to pass through, but not larger components of the fluid.

(pl. pores, adj. porate) ( Jackson, 1928; Wodehouse, 1935). A general term, applied in palynology to a circular or elliptic aperture with a length/breadth ratio less than 2 See also: aperture, porus, ulcus.

porus = hole, aperture; nuclear pore = aperture in nuclear envelope.

any tiny hole admitting passage of a liquid (fluid or gas)

Essentially circular micro-discontinuity in the surface extending through to the underlying coating or to the basis metal. Primary current distribution : The distribution of the current over the surface of an electrode in the absence of polarization.

a minute epidermal pore in a leaf or stem through which gases and water vapor can pass

In geology, a minute space between particles of a solid, such as soil or sediment, which permits the passage of liquids or gases.

A discrete volume of soil atmosphere completely surrounded by soil (cf. PORE SPACE).