The Collaborative International Dictionary of English v.0.48:
Coalescent \Co`a*les"cent\, a. [L. coalescens, p. pr.] Growing together; cohering, as in the organic cohesion of similar parts; uniting. [1913 Webster]WordNet (r) 3.0 (2006):
coalescent adj 1: growing together, fusing; "coalescent tradititions"; "coalescent bones" [syn: coalescent, coalescing]