English Dictionary

root

/ɹuːt/

noun

The part of a plant, generally underground, that anchors and supports the plant body, absorbs and stores water and nutrients, and in some plants is able to perform vegetative reproduction.

The root of the tree provides stability and absorbs nutrients from the soil.

意味（1）

The part of a plant, generally underground, that anchors and supports the plant body, absorbs and stores water and nutrients, and in some plants is able to perform vegetative reproduction.

This tree's roots can go as deep as twenty metres underground.

意味（2）

A root vegetable.

… two fields which should have been sown with roots in the early summer were not sown because the ploughing had not been completed early enough.

意味（3）

The part of a tooth extending into the bone holding the tooth in place.

Root damage is a common problem of overbrushing.

意味（4）

The part of a hair under the skin that holds the hair in place.

The root is the only part of the hair that is alive.

意味（5）

The part of a hair near the skin that has not been dyed, permed, or otherwise treated.

He dyed his hair black last month, so the grey roots can be seen.

意味（6）

(figuratively) The primary source; origin.

The love of money is the root of all evil.

意味（7）

(aviation) The section of a wing immediately adjacent to the fuselage.

意味（8）

(engineering) The bottom of the thread of a threaded object.

The root diameter is the minor diameter of an external thread and the major diameter of an internal one.

意味（9）

(arithmetic) Of a number or expression, a number which, when raised to a specified power, yields the specified number or expression.

The cube root of 27 is 3.

意味（10）

(arithmetic) A square root (understood if no power is specified; in which case, "the root of" is often abbreviated to "root").

Multiply by root 2.

意味（11）

(mathematical analysis) A zero (of an equation).

Holonym: kernel

意味（12）

(graph theory, computing) The single node of a tree that has no parent.

意味（13）

(linguistic morphology) The primary lexical unit of a word, which carries the most significant aspects of semantic content and cannot be reduced into smaller constituents. Inflectional stems often derive from roots.

Coordinate term: stem

意味（14）

(linguistics) A word from which another word or words are derived.

意味（15）

(music) The fundamental tone of any chord; the tone from whose harmonics, or overtones, a chord is composed.

意味（16）

The lowest place, position, or part.

deep to the roots of hell

意味（17）

(computing) In UNIX terminology, the first user account with complete access to the operating system and its configuration, found at the root of the directory structure; the person who manages accounts on a UNIX system.

I have to log in as root before I do that.

意味（18）

(computing) The highest directory of a directory structure which may contain both files and subdirectories.

I installed the files in the root directory.

意味（19）

(slang) A penis, especially the base of a penis.