D defs.my
Entry 1 sense Webster, 1913

Supplemental

/sŭpˌ-ləm-ĕn'-təl/ · Sup·ple·men·tal · IPA /ˌsʌpləˈmɛntəl/
01 a. Added to supply what is wanted; additional; being, or serving as, a supplement; as, a supplemental law; a supplementary sheet or volume.
  1. 1.
    Added to supply what is wanted; additional; being, or serving as, a supplement; as, a supplemental law; a supplementary sheet or volume.
Phrases & compounds
Supplemental air — the air which in addition to the residual air remains in the lungs after ordinary expiration, but which, unlike the residual air, can be expelled; reserve air.
Supplemental bill — a bill filed in aid of an original bill to supply some deffect in the latter, or to set forth new facts which can not be done by amendment.
Supplementary chords — in an ellipse or hyperbola, any two chords drawn through the extremities of a diameter, and intersecting on the curve.