D defs.my
Entry 1 sense Webster, 1913

delts

/(dĕlts)/ · IPA /dɛlts/
01 n. pl. The deltoid muscles; -- a contraction used by body-building and health enthusiasts. Used similarly to abs and pecs. See deltoid muscle.
  1. 1.
    The deltoid muscles; -- a contraction used by body-building and health enthusiasts. Used similarly to abs and pecs. See deltoid muscle.(Anat.) [abbrev.] See: abs, pecs