[con.cres.cence] n [L concrescentia, fr. concrescent-, concrescens, prp. of concrescere to grow together, fr. com- + crescere to grow--more at crescent] (1614) 1: increase by the addition of particles
2: a growing together: coalescence; esp: convergence and fusion of the lateral lips of the blastopore to form the primordium of an embryo -- con.cres.cent adj