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root1 British & World English

The part of a plant which attaches it to the ground or to a support, typically underground, conveying water and nourishment to the rest of the plant via numerous branches and fibres

root2 British & World English

(Of an animal) turn up the ground with its snout in search of food

rud2 British & World English

The spawn of a frog or toad (also toad rud).

root English Thesaurus

the fungus attacks a plant's roots

at root British & World English

Basically; fundamentally

ague root British & World English

Any of several plants whose roots or rhizomes are used medicinally; specifically = ague-grass.

air root British & World English

An aerial root, especially one emerging from the stem of a climbing plant or epiphyte which typically serves as a point of attachment to a support rather than as an organ of nutrient absorption.

ear root British & World English

The base of the external ear; the earlobe.

life root British & World English

(More fully life root plant) golden ragwort, Packera aurea, used medicinally for a wide variety of complaints.

man-root British & World English

Either of two North American ipomoeas with large tuberous roots, Ipomoea leptophylla, of the dry plains east of the Rocky Mountains, and the wild potato vine, I. pandurata.

musk root British & World English

Any of several plants with musk-scented roots, or the roots themselves: (a) the root of the sumbul, Ferula sumbul, used in medicine.

own-root British & World English

(Of a rose, fruit tree, etc.) growing from its own root, rather than grafted or budded.

poke root British & World English

The root of Indian poke (Veratrum viride), or of pokeweed (Phytolacca americana); either of these plants.

prop root British & World English

(In certain plants, especially trees such as mangroves) an adventitious root that grows out from the lower part of the stem or lower branches, serving to give it additional support.

root cap British & World English

A layer of parenchymatous cells covering the root meristem which serve to protect it from damage as it is pushed through the soil.

root end British & World English

The end of a plant stem, seed, etc., which is next to the root, or from which the root develops.

root-fill British & World English

To replace the contents of the root canals of (a tooth) with a filling material.

root form British & World English

Linguistics. A word form consisting of an unmodified root, especially an uninflected verb form.

root gall British & World English

Any of various galls occurring on the roots of plants, caused by nematodes, insects, fungi, or bacteria.

root-leaf British & World English

A leaf arising from the base of a stem; a radical leaf.

root room British & World English

A room used for storing edible roots and tubers.

root rot British & World English

Any of various fungal diseases of plants in which the roots decay.

root stem British & World English

Botany. Any stem-like root or rootlike stem, as an aerial root, caudex, rhizome, etc.

root weed British & World English

A weed which propagates itself chiefly by means of roots, as distinguished from one which originates from seed.

root work British & World English

Horticulture. The mature roots of trees and plants used to create ornamental features in a garden. Compare rockwork, 2b. Now historical.

alum root British & World English

Another term for heuchera.

cube root British & World English

The number which produces a given number when cubed

pig-root British & World English

(Of a horse or other animal) kick upwards with the hind legs, keeping the head down and the forelegs firmly planted

take root British & World English

(Of a plant) begin to grow and draw nourishment from the soil through its roots

root for British & World English

Support or hope for the success of (a person or group entering a contest or undertaking a challenge)

root ball British & World English

The mass formed by the roots of a plant and the soil surrounding them

root beer British & World English

An effervescent drink made from an extract of the roots and bark of certain plants

root crop British & World English

A crop that is a root vegetable or other root, e.g. sugar beet

root fly British & World English

A dark slender fly whose larvae may cause serious damage to the roots of crops

root hair British & World English

Each of a large number of elongated microscopic outgrowths from the outer layer of cells in a root, absorbing moisture and nutrients from the soil

root-knot British & World English

A disease of cultivated flowers and vegetables caused by eelworm infestation, resulting in galls on the roots

root run British & World English

The space over which the roots of a plant extend

root sign British & World English

Another term for radical sign.

aerial root British & World English

A plant root that grows in the air; especially a root of a climber that clings to its support, or a root of a mangrove that grows upwards to allow respiration.

black root British & World English

Any of various North American medicinal plants with dark-coloured roots; especially a kind of speedwell, Veronicastrum virginicum, native to moist ground in the eastern United States.

cancer root British & World English

Any of various plants used medicinally; especially any of several parasitic plants of the genera Orobanche and Conopholis (family Orobanchaceae), formerly used to treat skin complaints such as ulcers, and believed by some to be effective against cancer.

heart-root British & World English

The source of a person's most profound emotions; the bottom of the heart. Also in plural in same sense. Compare heart, root. Now poetic and rare.

Indian root British & World English

The American spikenard, Aralia racemosa.

latent root British & World English

A quantity which, when subtracted from each entry in the diagonal of a square matrix, makes the determinant of the resulting matrix equal to zero.

mallee root British & World English

The root of a mallee, used as a form of fuel.

memory root British & World English

The Indian turnip, Arisaema triphyllum, an aroid plant with an acrid corm which causes a burning sensation when chewed; the corm itself.

mother root British & World English

A primary or main root, from which lateral roots grow.

motor root British & World English

The ventral root of a spinal nerve, containing axons of motor neurons.

mouth-root British & World English

A small North American plant of shady swamps, Coptis trifolia (family Ranunculaceae), which has an astringent root reputed to cure sore mouths; also called goldthread.

nerve root British & World English

Anatomy. A bundle of nerve fibres as it emerges from the neuraxis; especially either of the paired (dorsal and ventral) bundles of nerve fibres that emerge from the spinal cord and unite to form a spinal nerve.

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