Definition of 垂線の足 (すいせんのあし)
すいせんあし
                        垂線の足
すいせんのあし
suisennoashi
noun
•
        
foot of a perpendicular line
Related Kanji
| 垂 | droop, suspend, hang, slouch | 
| 線 | line, track | 
| 足 | leg, foot, be sufficient, counter for pairs of footwear |