(biology) Describing any form of life based on the organic biopolymers present in all forms of life on Earth.

based on silicon; especially used of a proposed alternative biochemistry or lifeforms

Alternative form of off base

(computing, of a computing language, or expert system) based on a series of simple "if then" rules

(theology, religious studies) based on religious faith / (chiefly US, euphemistic) of civic associations connected with religious groups, specifically of such organizations sponsored by government funds

The altitude of the base of a mass of cloud; measured by a ceilometer.

(sports) An extreme sport consisting of jumping from a fixed structure on land, using a parachute.

present participle of BASE jump

plural of base unit

A unit of measurement which is not itself defined in terms of other units, and from which other units may be derived. / The main unit of a computer or hi-fi system.