Alternative form of touch base

Alternative form of waterbased

Alternative form of cover one's bases

Done on paper, as opposed to on a computer

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

plural of conjugate base

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

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

(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

(space science) based on space or space technology