Complemental
Pronunciation : Com`ple*men"tal
Part of Speech : a.
Definition : 1. Supplying, or tending to supply, a deficiency; fully completing. "Complemental ceremony." Prynne.
2. Complimentary; courteous. [Obs.] Shak. Complemental air (Physiol.), the air (averaging 100 cubic inches) which can be drawn into the lungs in addition to the tidal air, by the deepest possible inspiration. -- Complemental males (Zo?l.), peculiar small males living parasitically on the ordinary hermaphrodite individuals of certain barnacles.
Source : Webster's Unabridged Dictionary, 1913