13 letters · 24 points in Scrabble
adjective capable of division into symmetrical halves by any longitudinal plane passing through the axis
originEtymology tree Ancient Greek ᾰ̓κτῑ́ς (ăktī́s)der. English actino- Ancient Greek μορφή (morphḗ) Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ik English -ic English -morphic English actinomorphic From actino- + -morphic.
Etymology from Wiktionary, CC BY-SA 3.0