1570s, "subtract," from Latin subductus, past participle of subducere "to draw away, take away" (see subduce). Geological sense is from 1971, a back-formation from subduction. Related: Subducted; subducting.
subdenomination
subdivide
subdivision
subdominant
subduce
subduct
subduction
subdue
subdued
subfusc
sub-giant
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