I. -kshən noun
( -s )
Etymology: Late Latin subduction-, subductio, from Latin subductus (past participle of subducere ) + -ion-, -io -ion
1.
a. : the act of taking away : withdrawal
b. : arithmetical subtraction ; also : deduction
2. : the act or process of subduing
II. noun
: the action or process of the edge of one crustal plate descending below the edge of another
• subduct verb