supplementary : Idioms & Phrases
Supplemental air
(Physiol.) , 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.
Webster 1913
Supplemental bill
(Equity) , 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. Burrill. Daniel.
Webster 1913
supplementary benefit
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noun benefits paid to bring incomes up to minimum levels established by law
national assistance; social assistance.
WordNet
Supplementary chords
(Math.) , in an ellipse or hyperbola, any two chords drawn through the extremities of a diameter, and intersecting on the curve.