Definition of phosphorus
- n. - The morning star; Phosphor.
- n. - A poisonous nonmetallic element of the nitrogen group,
obtained as a white, or yellowish, translucent waxy substance, having a
characteristic disagreeable smell. It is very active chemically, must
be preserved under water, and unites with oxygen even at ordinary
temperatures, giving a faint glow, -- whence its name. It always occurs
compined, usually in phosphates, as in the mineral apatite, in bones,
etc. It is used in the composition on the tips of friction matches, and
for many other purposes. The molecule contains four atoms. Symbol P.
Atomic weight 31.0.
- n. - Hence, any substance which shines in the dark like
phosphorus, as certain phosphorescent bodies.