(physiology) The volume of air in the alveoli of the lung which does not partake in the exchange of gas.

Inclined or tending to remonstrate; expostulatory; urging reasons in opposition to something.

(geology) one of the major groups of rock that makes up the crust of the Earth; consists of pre-existing rock mass in which new minerals or textures are formed at higher temperatures and greater pr...

(informal) Alternative form of quick buck