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rootage a root system.
root beer a carbonated soft drink made or flavored with extracts derived from the roots, barks, and leaves of certain plants.
root borer an insect or its larva that bores into plant roots.
root canal the pulp-filled tubular channel in the root of a tooth. [2 definitions]
root cellar an underground storage room for root crops and other vegetables.
root crop a crop, such as potatoes, beets, or carrots, that is grown for its edible roots.
rooter1 a person, animal, or device that overturns earth by rooting.
rooter2 a person who actively supports, encourages, or cheers for a contestant or team. [2 definitions]
root hair a thin, hairlike, permeable outgrowth from a root that absorbs water and minerals from the soil.
rootless being without roots. [2 definitions]
rootlet a small root or branch of a root.
root mean square the square root of the arithmetic mean of the squares in a given set of numbers.
rootstock an underground, rootlike, usu. horizontal stem from which shoots grow upward and roots downward; rhizome. [2 definitions]
rooty having many roots. [2 definitions]
rope a strong, flexible, usu. thick and heavy line of twisted or braided hemp, nylon, or similar material. [8 definitions]
ropewalk a long narrow shed or building in which ropes are made. [2 definitions]
ropewalker one who walks or performs on a tightrope, esp. a paid entertainer; tightrope walker.
ropy like a rope or ropes. [2 definitions]
roque a variety of croquet played on a hard court surrounded by a raised rim or low wall.
Roquefort trademark for a strong cheese of sheep's or goat's milk, with veins of bluish mold.
roquet to knock (one's croquet ball) against another ball. [2 definitions]