Etymology
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hands down (adv.)

to win something hands down (1855) is from horse racing, from a jockey's gesture of letting the reins go loose in an easy victory.

The Two Thousand Guinea Stakes was not the best contested one that it has been our fortune to assist at. ... [T]hey were won by Meteor, with Scott for his rider; who went by the post with his hands down, the easiest of all easy half-lengths. Wiseacre certainly did the best in his power to spoil his position, and Misdeal was at one time a little vexatious. [The Sportsman, report from April 26, 1840]

Ancient Greek had akoniti "without a struggle, easily," from akonitos (adj.), literally "without dust," specifically "without the dust of the arena."

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-id 
adjectival word-forming element, especially in zoology, "belonging to, connected with, member of a group or class," in some cases probably via from French -ide, back-formed from Modern Latin names of zoological classes in -idae, as arachnid "a spider" from the biological class name arachnidae.

This -idae is the plural of Latin -ides, a masculine patronymic (indicating "descent from"), from Greek -ides "son of," denoting descent from the person to whose name it is attached (such as Heraklides).

In astronomy, of meteor showers, "having its radiant in" the constellation named (Perseid, Leonid, etc.), it probably represents Latin -idis, from Greek -idos, the genitive of the feminine form of the patronymic suffix.
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meteorological (adj.)

1560s, "of or pertaining to atmospheric phenomena," especially "of or pertaining to weather," from French météorologique or directly from a Latinized form of Greek meteōrologikos "pertaining to the earth's atmosphere, from meteōrologia, literally "discussion of high things" (see meteorology). Related: Meteorologically.

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meteorologist (n.)
1620s, from meteorology + -ist. Earlier was meteorologician (1570s). Greek meteorologos meant "one who deals with celestial phenomena, astronomer."
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