10 letters · 10 points in Scrabble
adjective involving only one part or side
adjective tracing descent from either the paternal or the maternal line only
originA modern creation (circa 1802), from New Latin ūnilaterālis (“one-sided”), from Latin ūnus (“one”) + laterālis (“sided, lateral”), equivalent to uni- + lateral.
Etymology from Wiktionary, CC BY-SA 3.0