| 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] |
| rorqual |
any of a related group of whales, such as the blue whale, that have lengthwise grooves on the underside and a small, well-developed dorsal fin; finback. |
| Rorschach test |
a psychological test in which a profile of the patient is formed on the basis of the patient's subjective interpretation of standardized designs that resemble ink blots. |
| rosacea |
a chronic skin condition affecting the face that is characterized by redness, pimples, swelling, and dilation of blood vessels; acne rosacea. |