[mass noun](Biology)the coalescence or growing together of parts originally separate (生)愈合,合生
派生 concrescent adjective 语源
early 17th cent. (in the senses 'growth by assimilation' and 'a concretion'): from con- 'together' + -crescence, on the pattern of words such as excrescence. The current sense dates from the late 19th cent