7 letters · 13 points in Scrabble
noun a dense flower cluster (as of the lilac or horse chestnut) in which the main axis is racemose and the branches are cymose
originLearned borrowing from Latin thyrsus, from Ancient Greek θύρσος (thúrsos). Doublet of thyrse, torse, and torso.
Etymology from Wiktionary, CC BY-SA 3.0