D defs.my
Entry 1 sense Webster, 1913

Intercostal

· In·ter·cos·tal · IPA /ˌɪn.tɚˈkɔ.stəl/
01 a. Between the ribs; pertaining to, or produced by, the parts between the ribs; as, intercostal respiration, in which the chest is alternately…
  1. 1.
    Between the ribs; pertaining to, or produced by, the parts between the ribs; as, intercostal respiration, in which the chest is alternately enlarged and contracted by the intercostal muscles.(Anat. & Physiol.)