Definition of sub- in English:

sub-

Pronunciation: /sʌb, səb/

prefix

1At, to, or from a lower level or position: subalpine
1.1Lower in rank: subaltern subdeacon
1.2Of a smaller size; of a subordinate nature: subculture
2Somewhat; nearly; more or less: subantarctic
3Denoting subsequent or secondary action of the same kind: sublet subdivision
4Denoting support: subvention
5 Chemistry In names of compounds containing a relatively small proportion of a component: suboxide

Origin

from Latin sub 'under, close to'.

Usage

Sub- is also found assimilated in the following forms: suc- before c; suf- before f; sug- before g; sup- before p; sur- before r; sus- before c, p, t.

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