bul: перпендикуляр

Information
has URI	http://lexvo.org/id/term/bul/%D0%BF%D0%B5%D1%80%D0%BF%D0%B5%D0%BD%D0%B4%D0%B8%D0%BA%D1%83%D0%BB%D1%8F%D1%80

Meaning
means	(noun) a straight line at right angles to another line perpendicular
means	(noun) an extremely steep face perpendicular