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mol·ly 1

also mol·lie  (mŏl′ē)
n. pl. mol·lies
Any of several tropical and subtropical live-bearing fishes of the genus Poecilia of the Americas, often kept in home aquariums.

[From New Latin Mollienesia, former genus name, after Comte François Nicolas Mollien (1758-1850), French politician.]

mol·ly 2

or Mol·ly  (mŏl′ē)
n. Slang
A powdered form of MDMA.

[Shortening and alteration (influenced by the name Molly) of molecular, used of pure crystalline powdered MDMA originally taken from commercially manufactured capsules + -y.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -lies
(Animals) any brightly coloured tropical or subtropical American freshwater cyprinodont fish of the genus Mollienisia
[C19: from New Latin Mollienisia, from Comte F. N. Mollien (1758–1850), French statesman]


n, pl -lies
informal Irish an effeminate, weak, or cowardly boy or man
[C18: perhaps from Molly, pet name for Mary]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈmɒl i)

n., pl. -lies.
any of certain livebearing freshwater fishes of the genus Poecilia, popular in home aquariums.
[irreg. after Count French.N. Mollien (1758–1850), French statesman]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.molly - popular aquarium fishmolly - popular aquarium fish    
live-bearer, poeciliid, poeciliid fish, topminnow - small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
The second of these children was a daughter, whose name was Molly, and who was esteemed one of the handsomest girls in the whole country.
Now, though Molly was, as we have said, generally thought a very fine girl, and in reality she was so, yet her beauty was not of the most amiable kind.
In the conduct of this matter, I say, Molly so well played her part, that Jones attributed the conquest entirely to himself, and considered the young woman as one who had yielded to the violent attacks of his passion.
Poyser should scold Molly the housemaid with unusual severity.
"I'm sure I donna want t' go wi' the whittaws," said Molly, whimpering, and quite overcome by this Dantean picture of her future, "on'y we allays used to comb the wool for 'n at Mester Ottley's; an' so I just axed ye.
And to think o' your knowing no better, Molly, and been here a-going i' nine months, and not for want o' talking to, neither--and what are you stanning there for, like a jack as is run down, instead o' getting your wheel out?
`If I take a drink in Black Hawk, Molly knows it in Omaha!'
`Oh, we'll make it all right with Molly. Get your back up, Johnnie.'
Molly knew that the cause of her dingy rags was not her husband's neglect, but the demon Opium to whom she was enslaved, body and soul, except in the lingering mother's tenderness that refused to give him her hungry child.
In another moment Molly had flung something away, but it was not the black remnant--it was an empty phial.
He begins to be very ragged, and I hope I shall be pardoned if I equip him with new clothes and frocks." Or again:- - "The brats, my girls, stand on each side of the table, and Molly says what I am writing now is about her new coat.
is Milk and Sugar, Mirth and Safety, Music and Songs, Meat and Sauce, as well as Molly and Spot, and Mary and Steele." I think the children must have loved their kind father who wrote such pretty nonsense to them.