What does centriole mean?
A centriole is a minute, barrel-shaped structure found inside the cells of most animals and many other eukaryotes. Built from organized bundles of protein filaments called microtubules, it serves two principal purposes: it helps organize the spindle apparatus that separates chromosomes during cell division, and it anchors the growth of hair-like projections such as cilia and flagella. Centrioles typically occur in pairs, oriented perpendicular to each other, within a larger structure known as the centrosome. Because they are so central to the mechanics of division, abnormalities in centriole number or function have been linked to developmental defects and certain cancers. The word is strictly scientific, appearing mainly in textbooks, research papers, and medical literature rather than everyday conversation. Its precise, specialized meaning makes it valuable for students of biology, medicine, and microscopy who need to describe cellular architecture accurately.
nounA centriole is a small cylindrical organelle in animal cells, composed of microtubules, that plays a key role in organizing the spindle fibres during cell division and in anchoring cilia and flagella.
- A small cylindrical organelle made of microtubule triplets, found in most eukaryotic cells, which helps organize the mitotic spindle during cell division.
"Before mitosis begins, each centrosome contains two centrioles arranged at right angles to one another."
"Researchers observed that cells lacking functional centrioles still divided, though with frequent errors."
"In many animals, sperm flagella grow from a centriole inherited from the father."
Standard plural formed by adding -s; commonly used because centrioles occur in pairs within the centrosome.
"Animal cells typically contain two centrioles per centrosome before replication."
Every dividing animal cell spins its own microscopic scaffold — and at the heart of it sit two tiny barrels called centrioles, arranged at right angles like the hands of a clock.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of centriole
The term 'centriole' derives from Latin 'centrum', meaning centre, combined with the diminutive suffix '-ole', reflecting its small size relative to the cell. It was coined in the late nineteenth century as light microscopists began identifying distinct structures within dividing cells. It shares its root with related biological terms such as 'centrosome', 'centromere', and 'centrifugal', all built on the same Latin base.
How centriole is actually used
Strictly technical vocabulary used almost exclusively in biology and medicine; it carries no figurative or colloquial use. Plural is 'centrioles'.
Easily confused with centriole
The centrosome is the larger structure that surrounds and includes the centrioles; a centriole is just one component within it.
A centromere is the region of a chromosome where sister chromatids are joined, whereas a centriole is an organelle involved in spindle organization.