What does radicle mean?
A radicle is, most commonly, the part of a plant embryo that becomes the root. It is a precise biological term used in descriptions of germination, plant development, and seed structure: a radicle extends from the embryo and grows in the direction of the soil, usually downward. In anatomy and zoology, “radicle” can refer more generally to a rootlike process, especially one associated with a nerve. The word also has a rare historical use in chemistry for a radical or a group of atoms capable of existing independently. Although ordinary words such as “root” and “rootlet” can describe similar structures in less technical contexts, a radicle specifically emphasizes an embryonic or rootlike part. The term is consequently most useful in scientific and educational writing.
nounA radicle is the part of a plant embryo that develops into the root. In zoology, it can also mean a rootlike structure, especially a root of a nerve; in chemistry, the term is a rare or historical name for a radical or a group of atoms capable of existing independently.
- The portion of a plant embryo that develops into the root.
- A rootlike or supporting process, especially one of the root structures of a nerve.
- In historical or specialized chemistry, a radical or group of atoms considered as a unit.
"The radicle emerged from the seed and began to grow downward."
"The radicle of the germinating seed was visible beneath the seed coat."
"The anatomy text describes the radicle as one of the rootlike processes arising from a spinal nerve."
The plural is used when referring to multiple embryonic root structures or other rootlike processes.
"The seedlings developed short radicles within a few days."
A radicle is the plant embryo's promise of a root: before the first true root appears, this tiny structure already knows which way to grow.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does radicle come from?
The word comes through Latin from radicula, a diminutive of radix, meaning “root.” In English it was adopted in botanical terminology for the root-forming portion of an embryo. Its wider scientific senses developed by analogy with rootlike anatomical structures and, later, with chemical groups considered to have a distinct identity. Related English words include radical, radish, and eradicate, all reflecting the same Latin root.
How radicle is actually used
The word is most common in botanical and biological writing. Its zoological and chemical senses are specialized, with the chemical sense now largely historical or uncommon.
Easily confused with radicle
A radicle is an embryonic or rootlike structure, whereas a radical in chemistry is an atom or group of atoms with an unpaired electron or an overall charge.
A radicle is the root-forming part of a plant embryo, while a radish is the edible root of a particular plant.