Webster's English Dictionary

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apothecium

apo.the.ci.um \-'the--s(h)e--*m\ \-s(h)e--*\ n or apo.the.cia [NL, fr. L 
   apotheca] pl  : a spore-bearing structure in many lichens and fungi 
   consisting of a disc oid or cupped body bearing asci on the exposed flat or 
   concave surface