Mother \Moth"er\, a. Received by birth or from ancestors; native, natural; as, mother language; also acting the part, or having the place of a mother; producing others; originating.

It is the mother falsehood from which all idolatry is derived. --T. Arnold.

Mother cell (Biol.), a cell which, by endogenous divisions, gives rise to other cells (daughter cells); a parent cell.

Mother church, the original church; a church from which other churches have sprung; as, the mother church of a diocese.

Mother country, the country of one's parents or ancestors; the country from which the people of a colony derive their origin.

Mother liquor (Chem.), the impure or complex residual solution which remains after the salts readily or regularly crystallizing have been removed.

Mother queen, the mother of a reigning sovereign; a queen mother.

Mother tongue.
   (a) A language from which another language has had its origin.
   (b) The language of one's native land; native tongue.

Mother water. See Mother liquor (above).

Mother wit, natural or native wit or intelligence.

Source: Webster's Revised Unabridged Dictionary (1913)