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单词 aster
释义

Definition of aster in English:

aster

noun ˈastəˈæstər
  • 1A plant of a large genus that includes the Michaelmas daisy, typically having purple or pink rayed flowers.

    Genus Aster, family Compositae: numerous species. See also China aster

    Example sentencesExamples
    • These asters make excellent backdrops for larger flowers in bouquets, but we also like letting them shine on their own - toward the fronts of borders or in small, densely planted beds.
    • When new leaves appear, divide asters, bellflowers, chrysanthemums, daylilies, sedums, Shasta daisies, and yarrow.
    • Butterflies feasted on purple asters, and dragonflies zigzagged over the buttonbushes, which bore a crop of round, dry fruits.
    • Among the favorites are asters and daisies, milkweeds, mustards, mints, peas, and vervains.
    • Purple asters bloom in fall, attracting monarch butterflies and providing one last blast of color when many blooms have faded.
    • The aster is considered the other classic autumn flower.
    • The fastest-growing asters require yearly division in spring.
    • Then, long after the foxgloves have withered and the last crabapple has rolled from the tree and been carted off by a brown squirrel, the asters bloom, the last flower before snow.
    • Crabgrass and plantain are an indication of acidic soil, while wood asters and poppies prefer alkaline soil.
    • As tender perennials are damaged by frost, remove them and pop in fall-blooming asters, chrysanthemums, and pansies.
    • Roses, pansies, perennial asters, zinnias and even weeds become mildewed.
    • There are flowers everywhere in a carpet of colour: orange globemallows and white asters and purple lupins.
    • Sow annual flowers such as asters, cosmos, zinnias and marigolds as soon as the frost has passed and the air begins to warm up.
    • Not long after we moved from our small, shady city lot to a sprawling sunny piece of land in the country, we were rewarded by a visit from a flock of monarch butterflies that stopped to feed at a plot of wild asters.
    • After a bit of a summer lull, the blues of woodland asters and the yellows of woodland goldenrods render the forest vibrant in late August.
    • As with other members of the daisy family, annual aster flowers are composed of many long, slender petals radiating from a central disc of bright yellow.
    • Small-flowered plants such as asters, coral bells, nemesia, and yarrow are great fillers.
    • Plant late-blooming asters behind shorter perennials to hide the damage until they finish blooming.
    • After the first hard freeze, cut back perennials such as aster, campanula, daylily, phlox, and veronica, leaving 6-inch stubs above the ground.
    • But asters also come in a full range of reds and pinks, plus white.
  • 2Biology
    A radiating array of microtubules associated with a centrosome in a dividing cell.

    Example sentencesExamples
    • Such abnormalities can be due to abnormalities in the number of asters and spindle structures at earlier stages of meiosis.
    • Each centriole now consists of a pair of protein bodies surrounded by radiating strands of protein called the aster.
    • The most interesting aster configuration occurs when the spindle is parallel to the surface.
    • 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.

Origin

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

Rhymes

Antofagasta, Astor, canasta, Jocasta, oleaster, pasta, piastre (US piaster), pilaster, poetaster, Rasta, Zoroaster
 
 

Definition of aster in US English:

aster

nounˈastərˈæstər
  • 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

    Example sentencesExamples
    • But asters also come in a full range of reds and pinks, plus white.
    • Among the favorites are asters and daisies, milkweeds, mustards, mints, peas, and vervains.
    • Then, long after the foxgloves have withered and the last crabapple has rolled from the tree and been carted off by a brown squirrel, the asters bloom, the last flower before snow.
    • Roses, pansies, perennial asters, zinnias and even weeds become mildewed.
    • Purple asters bloom in fall, attracting monarch butterflies and providing one last blast of color when many blooms have faded.
    • Crabgrass and plantain are an indication of acidic soil, while wood asters and poppies prefer alkaline soil.
    • The fastest-growing asters require yearly division in spring.
    • After a bit of a summer lull, the blues of woodland asters and the yellows of woodland goldenrods render the forest vibrant in late August.
    • Small-flowered plants such as asters, coral bells, nemesia, and yarrow are great fillers.
    • After the first hard freeze, cut back perennials such as aster, campanula, daylily, phlox, and veronica, leaving 6-inch stubs above the ground.
    • Plant late-blooming asters behind shorter perennials to hide the damage until they finish blooming.
    • Sow annual flowers such as asters, cosmos, zinnias and marigolds as soon as the frost has passed and the air begins to warm up.
    • Not long after we moved from our small, shady city lot to a sprawling sunny piece of land in the country, we were rewarded by a visit from a flock of monarch butterflies that stopped to feed at a plot of wild asters.
    • As with other members of the daisy family, annual aster flowers are composed of many long, slender petals radiating from a central disc of bright yellow.
    • The aster is considered the other classic autumn flower.
    • Butterflies feasted on purple asters, and dragonflies zigzagged over the buttonbushes, which bore a crop of round, dry fruits.
    • These asters make excellent backdrops for larger flowers in bouquets, but we also like letting them shine on their own - toward the fronts of borders or in small, densely planted beds.
    • As tender perennials are damaged by frost, remove them and pop in fall-blooming asters, chrysanthemums, and pansies.
    • There are flowers everywhere in a carpet of colour: orange globemallows and white asters and purple lupins.
    • When new leaves appear, divide asters, bellflowers, chrysanthemums, daylilies, sedums, Shasta daisies, and yarrow.
  • 2Biology
    A radiating array of microtubules associated with a centrosome in a dividing cell.

    Example sentencesExamples
    • Before mitosis, the centrosome becomes duplicated and the daughter centrosomes move to opposite sides of the nucleus and form asters.
    • Such abnormalities can be due to abnormalities in the number of asters and spindle structures at earlier stages of meiosis.
    • 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.
    • Meiosis is completed shortly after ovulation, concomitant with the formation of an extensive sperm aster nucleated by the sperm-derived centrosome.

Origin

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

 
 
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更新时间:2024/12/24 1:33:36