Definition of aster in English:

aster

Pronunciation /ˈastər/ /ˈæstər/

Translate aster into Spanish

noun

  • 1A plant of the daisy family that has bright rayed flowers, typically of purple or pink.

    Genus Aster, family Compositae: numerous species, many of which bloom in autumn, including the wild purple New England aster (A. novae-angliae). See also China aster

  • 2Biology
    A radiating array of microtubules associated with a centrosome in a dividing cell.

    ‘Such abnormalities can be due to abnormalities in the number of asters and spindle structures at earlier stages of meiosis.’
    • ‘Before mitosis, the centrosome becomes duplicated and the daughter centrosomes move to opposite sides of the nucleus and form asters.’
    • ‘Meiosis is completed shortly after ovulation, concomitant with the formation of an extensive sperm aster nucleated by the sperm-derived centrosome.’
    • ‘The most interesting aster configuration occurs when the spindle is parallel to the surface.’
    • ‘Each centriole now consists of a pair of protein bodies surrounded by radiating strands of protein called the aster.’

Origin

Early 17th century (in the sense ‘a star’): via Latin from Greek astēr ‘star’.