Definition of mesembryanthemum
: any of a genus (Mesembryanthemum) of chiefly southern African fleshy-leaved herbs or subshrubs of the carpetweed family
Origin of mesembryanthemum
New Latin, irregular from Greek mesēmbria midday (from mes- + hēmera day) + anthemon flower, from anthos — more at anthology
First Known Use: 1753
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