semilattice (Q834585)
From Wikidata
a partially ordered set in which every nonempty finite set has a least upper bound or in which every nonempty finite set has a greatest lower bound
Language  Label  Description  Also known as 

English 
semilattice

a partially ordered set in which every nonempty finite set has a least upper bound or in which every nonempty finite set has a greatest lower bound

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Wikipedia(5 entries)
 enwiki Semilattice
 eswiki Semirretículo
 itwiki Semireticolo
 ruwiki Полурешётка
 zhwiki 半格