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sub- Definition

sub- (sub, səb)

  1. under, beneath, below, from beneath submarine, subsolar
  2. lower in rank, position, or importance than; inferior or subordinate to subaltern, subhead
  3. to a lesser degree than, somewhat, slightly subhuman, subaquatic
    1. so as to form a division into smaller or less important parts subdivide
    2. forming such a division subspecies
    1. near, bordering on subalpine
    2. nearly, almost subteen
  6. Chem.
    1. with less than the normal amount of (the specified substance) suboxide
    2. basic subcarbonate

Etymology: < L sub, under, below: see up