(chemistry) A synthetic, stable perfluorinated carboxylic acid and fluorosurfactant with industrial applications, a toxicant and carcinogen in animals, persistent in the environment and associated ...

A passageway through which to enter or leave, such as one between seating areas in an auditorium, or between two buildings. / An articulating bridge or ramp, such as from land to a dock or a ship.

Of or pertaining to neuropathology

plural of birchwood