Hebrew edit

Etymology edit

From תת־ (tát-) +‎ סדרה (sidrá).

Noun edit

תת־סדרה (tát-sidráf

  1. (taxonomy) A suborder: a taxon of a rank below order and above infraorder.
  2. (mathematics) A subsequence: a sequence consisting of some of the elements of another sequence, in the same order.