Webster's English Dictionary

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sere

1. sere \'si(*)r\ aj [ME, fr. OE se-ar dry; akin to OHG so-re-n to wither, 
   Gk (Xhauos dry 1: WITHERED  archaic  2: THREADBARE 
2. sere n [L series series] : a series of ecological communities succeeding 
   one another in the biotic  development of an area or formation