| 单词 | ad |
| 释义 | Word Frequency ad 1(æd) noun short for advertisement Word Frequency ad 2(æd) noun tennis, US and Canadian short for advantage . Brit equivalent: van Word Frequency ad 3the internet domain name for Andorra Word Frequency ADabbreviation for ▶ USAGE In strict usage, ad is only employed with specific years: he died in 1621 ad, but he died in the 17th century (and not the 17th century ad). Formerly the practice was to write ad preceding the date (ad 1621), and it is also strictly correct to omit in when ad is used, since this is already contained in the meaning of the Latin anno Domini (in the year of Our Lord), but this is no longer general practice. bc is used with both specific dates and indications of the period: Heraclitus was born about 540 bc; the battle took place in the 4th century bc1. (indicating years numbered from the supposed year of the birth of Christ) anno Domini 70 ad Compare BC 2. military active duty 3. military air defence 4. Dame of the Order of Australia Word origin (sense 4) Latin: in the year of the LordWord Frequency ad-prefix 1. to; towards adsorb adverb 2. near; next to adrenal Word origin from Latin: to, towards. As a prefix in words of Latin origin, ad- became ac-, af-, ag-, al-, an-, acq-, ar-, as-, and at- before c, f, g, l, n, q, r, s, and t, and became a- before gn, sc, sp, stWord Frequency -ad 1suffix forming nouns 1. a group or unit (having so many parts or members) triad 2. an epic poem concerning (the subject indicated by the stem) Dunciad Word origin via Latin from Greek -ad- (plural -ades), originally forming adjectives; names of epic poems are all formed on the modelof the IliadWord Frequency -ad 2suffix forming adverbs denoting direction towards a specified part in anatomical descriptions cephalad Word origin from Latin ad to, towards |
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