tathāhyekadiṅmukhapravṛtte bhūyasi rūpādike dṛṣṭe spṛṣṭe vā dīrgham iti vyavaharanti / tadapekṣayā cālpīyasi samutpanne hrasvam iti /
Thus, when many colors etc. turning towards one direction are seen or touched, [people] speak of [it as] "long"; and when fewer [colors etc.] arise in comparison to that, [they speak of it as] "short."