trail; clues; thread (of a story)

(electricity) line; circuit; wire; (traffic) road; track; route

line (in drawing, calligraphy etc); the lines or contours of a three-dimensional object (hairstyle, clothing, car etc)

tip-off

spy; informer

online

nematode

offline; below the line

ball of string

line drawing; diagram; line graph

coil (of wire)

linear; linearity

telephone pole; utility pole

line segment

linear

(computing) thread

cotton rope; cord

cable; wire; cord (computer)

seam; stitching; decorative trim; molding (used to conceal joints in architecture or interior design)

thread spool

fret saw; jigsaw

incense stick

(bird species of China) wire-tailed swallow (Hirundo smithii)

line chart

line chart

linear wave

mitochondrion

linear velocity

online search

linear algebra

linear regression (statistics)

linear equation (math.)

(math.) vector space; linear space

linear operator (math.)

linear system

linear programming