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British Dictionary definitions for epitheca

epitheca

noun plural -cae (-siː)
  1. the outer and older layer of the cell wall of a diatomCompare hypotheca

Word Origin

C19: from epi- + theca
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012