8 letters · 10 points in Scrabble
adjective linear with respect to each of two variables or positions
originEtymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwi- Proto-Italic *dwi- Latin bi-bor. English bi- English linear English bilinear From bi- + linear.
Etymology from Wiktionary, CC BY-SA 3.0