The term LINEAR UNIT is used to describe a unit of measurement that is used to measure length. The crossword solutions for this term are LIGNE (5 letters), ROD (3 letters), METRE (5 letters), INCH (4 letters), MIL (3 letters), and PACE (4 letters). LIGNE is the French word for line, and is used to measure length in the metric system. ROD is an imperial unit of length, also known as a pole or perch. METRE is the base unit of length in the metric system. INCH is a unit of length in the imperial system, equal to 1/12 of a foot. MIL is a unit of length in the imperial system, equal to one thousandth of an INCH. PACE is a unit of length in the imperial system, equal to the length of a single step.