\A"["e]r*en`chym\, Aerenchyma \A`["e]r*en"chy*ma\, n.
[NL. a["e]renchyma. See {A["e]ro-}; {Enchyma}.] (Bot.)
A secondary respiratory tissue or modified periderm, found in
many aquatic plants and distinguished by the large
intercellular spaces.