Added 10 October 2026 mesangiosperm noun noun ! Definition from Wiktionary (CC BY-SA). More about mesangiosperm at Wordnik → Where our words come from → Any flowering plant of the clade Mesangiospermae Related Words: angiospermmesembryanthemummetaspermagamospermchloranthalemagnoliophytemedullosaleanmonospermnonangiospermmelastomegenistoid Back to today's word