\Re*spir"a*to*ry\ (r?*sp?r"?*t?*r? or r?s"p?*r?-),
a. (Physiol.)
Of or pertaining to respiration; serving for respiration; as,
the respiratory organs; respiratory nerves; the respiratory
function; respiratory changes.
{Respiratory foods}. (Physiol.) See 2d Note under {Food}, n.,
   1.
{Respiratory tree} (Zo["o]l.), the branched internal gill of
   certain holothurians.