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

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

3. (v. i.) To look or gaze steadily in reading or studying; to fix the attention; to be absorbed; -- often with on or upon, and now usually with over.

Eustachian tube Fallopian tube aperture avenue blowhole broaching canal cavity channel chasm check chute clearing cleft con crack debouch disclosure door duct egress emunctory escape estuary examine exhaust exit fenestra fistula floodgate flume fontanel foramen gap gape gat go over gulf hiatus hole hollow inlet interval intestines lacuna laying open leak loophole meatus opening opening up orifice ostium out outcome outfall outgate outgo outlet oviduct passageway perforation peruse pore over port read sally port salpinx scrutinize slot sluice space spiracle split spout stoma study tap thoracic duct throwing open uncorking unstopping ureter urethra vagina vas vent ventage venthole vessel vomitory way out weir yawn