There are 2 definitions of -ad in English:

-ad1

Syllabification: -ad

suffix

  • Forming nouns:
  • 1In collective numerals: pentad triad
  • 1.1In groups, periods, or aggregates: Olympiad
  • 2In names of females in classical mythology, such as Dryad and Naiad.
  • 2.1In names of districts such as Troad.
  • 3In names of poems and similar compositions: Iliad jeremiad
  • 4Forming names of members of some taxonomic groupings: bromeliad

Origin

from Greek -ad- (from nouns ending in -as).

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Word of the day astrogation
Pronunciation: ˌastrəˈgāSHən
noun
(in science fiction) navigation in outer space

There are 2 definitions of -ad in English:

-ad2

Syllabification: -ad

suffix

  • Forming nouns such as ballad, salad. Compare with -ade1.

Origin

representing the French noun ending -ade.

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