The Collaborative International Dictionary of English v.0.48:

Collenchyma \Col*len"chy*ma\, n. [NL., fr. Gr. ko`lla glue + ?
   an infusion. Formed like parenchyma.] (Bot.)
   A tissue of vegetable cells which are thickend at the angles
   and (usually) elongated.
   [1913 Webster]