ˈɔksɪdʒən n. Chem. a
colourless tasteless odourless
gaseous element, occurring
naturally in
air,
water,
and most minerals and
organic substances, and
essential to
plant and
animal life. °Symb.: O. øoxygen
mask a mask placed
over the nose and
mouth to supply oxygen
for breathing. oxygen tent a tentlike
enclosure supplying a
patient with air
rich in oxygen. øøoxygenous adj. [F oxygëne acidifying
principle (as OXY2): it
was at
first held to be the essential principle in the
formation of acids]