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ephemera n. 生命极短促之物,蜉蝣 生命极短促之物,蜉蝣 ephemera n 1: something transitory; lasting a dayMay \ May\, n. [ F. Mai, L. Maius; so named in honor of the goddess Maia ( Gr. Mai^ a), daughter of Atlas and mother of Mercury by Jupiter.] 1. The fifth month of the year, containing thirty- one days. -- Chaucer. [ 1913 Webster] 2. The early part or springtime of life. [ 1913 Webster] His May of youth, and bloom of lustihood. -- Shak. [ 1913 Webster] 3. ( Bot.) The flowers of the hawthorn; -- so called from their time of blossoming; also, the hawthorn. [ 1913 Webster] The palm and may make country houses gay. -- Nash. [ 1913 Webster] Plumes that mocked the may. -- Tennyson. [ 1913 Webster] 4. The merrymaking of May Day. -- Tennyson. [ 1913 Webster] { Italian may} ( Bot.), a shrubby species of { Spiraea} ({ Spiraea hypericifolia}) with many clusters of small white flowers along the slender branches. { May apple} ( Bot.), the fruit of an American plant ({ Podophyllum peltatum}). Also, the plant itself ( popularly called { mandrake}), which has two lobed leaves, and bears a single egg- shaped fruit at the forking. The root and leaves, used in medicine, are powerfully drastic. { May beetle}, { May bug} ( Zool.), any one of numerous species of large lamellicorn beetles that appear in the winged state in May. They belong to { Melolontha}, and allied genera. Called also { June beetle}. { May Day}, the first day of May; -- celebrated in the rustic parts of England by the crowning of a May queen with a garland, and by dancing about a May pole. { May dew}, the morning dew of the first day of May, to which magical properties were attributed. { May flower} ( Bot.), a plant that flowers in May; also, its blossom. See { Mayflower}, in the vocabulary. { May fly} ( Zool.), any species of { Ephemera}, and allied genera; -- so called because the mature flies of many species appear in May. See { Ephemeral fly}, under { Ephemeral}. { May game}, any May- day sport. { May lady}, the queen or lady of May, in old May games. { May lily} ( Bot.), the lily of the valley ({ Convallaria majalis}). { May pole}. See { Maypole} in the Vocabulary. { May queen}, a girl or young woman crowned queen in the sports of May Day. { May thorn}, the hawthorn. [ 1913 Webster]
Ephemera \ E* phem" e* ra\, n. [ NL., fr. Gr. ? a day fly, fr. ? daily, lasting but a day; ? over ? day.] 1. ( Med.) A fever of one day' s continuance only. [ 1913 Webster] 2. ( Zo[" o] l.) A genus of insects including the day flies, or ephemeral flies. See { Ephemeral fly}, under { Ephemeral}. [ 1913 Webster]
Ephemeron \ E* phem" e* ron\, n.; pl. { Ephemera}. [ NL. See { Ephemera}.] ( Zo[" o] l.) One of the ephemeral flies. [ 1913 Webster]
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