filum
filum (fI-l[schwa]m). [Latin “thread”] Hist. 1. A thread or wire that holds (esp. legal) papers together to form a file. • This was the ancient method of filing legal papers. 2. An imaginary thread or line passing through the middle of a stream or road. — Also termed (in sense 1) filacium. filum aquae (fI-l[schwa]m […]