Main Entry: line

Pronunciation: \ˈlīn\

Function: noun

1 : something (as a ridge, seam, mark, or streak) that is distinct, elongated, and narrow—see linea
2 : a strain produced and maintained especially by selective breeding or biological culture
3 : a narrow short synthetic tube (as of plastic) that is inserted approximately one inch into a vein (as of the arm) to provide temporary intravenous access for the administration of fluid, medication, or nutrients