英语词汇“ephemerist”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词

ephemerist

释义

ephemera /ef-emˈə-rə or -ēmˈ/

noun (pl ephemˈeras or ephemˈerae)

An insect of the mayfly genus Ephemera, whose adult life is very short
Something which lasts a short time (but see also ephemeron below)

ORIGIN: Gr ephēmeros living a day, from epi for, and hēmerā a day

ephemˈeral adjective

Existing only for a day
Short-lived
Fleeting

noun

Anything very short-lived

ephemeralˈity noun

ephemerally adverb

ephemˈeralness noun

ephemˈerid noun

An insect of the mayfly family Ephemerˈidae /-merˈi-dē/ (order Ephemeropˈtera)

ephemeridˈian adjective

ephemˈeris noun (pl ephemerides /ef-e-merˈi-dēz/)

An astronomical almanac tabulating the daily positions of the sun, moon, planets and certain stars, etc
An individual table showing this
An account of daily transactions (archaic)
A journal (archaic)

ephemˈerist noun

Someone who studies the daily motions of the planets
A student or collector of ephemera

ephemˈeron noun (pl ephemˈera)

An insect that lives only for a day
(usu in pl) an object of limited worth or usefulness, having no lasting value
Anything ephemeral

ephemˈerous adjective

ephemeris time noun

Time measured by orbital movement of earth, moon and planets, differing from mean solar time in that it allows for irregularities due to variations in rate of rotation of the earth, an ephemeris second being a fixed fraction of the solar year 1900

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