Definition of centriole in US English:



  • A minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.

    • ‘In contrast to the canonical pathway of spindle formation, in diverse organisms such as mammals, nematodes, and insects, female meiotic spindles are organized in the absence of centrosomes and centrioles.’
    • ‘In most animal cells, the centrosome contains a pair of centrioles, which consist of an array of microtubules.’
    • ‘It is the sperm basal body that serves as a centriole in the zygotic microtubule organizing center.’
    • ‘Closure of the midbody requires the presence of a mother centriole to close the intercellular bridge.’
    • ‘Glaucophytes undergo open mitosis and lack centrioles associated with the centrosomes.’


Late 19th century: from modern Latin centriolum, diminutive of centrum (see center).