American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
(1)
WordNet
(3)
Elsewhere on the web
OLDWICK, N.J. - (Business Wire) A.M. Best Co. has affirmed the financial strength rating of A+ (Superior) and issuer credit rating of "aa -" of Hang Seng Insurance Company Limited (Hang Seng Insurance) (Hong Kong).— The Earth Times Online Newspaper
SetTimer, aa, 60000; updates every 1 minute aa: formattime, thedate, ,dd-MM-yyyy— AutoHotkey Community
After 500 ps of simulation, a coiled region appeared, interrupting the C-terminal α-helix around amino acid (aa) residue 32.— PLoS ONE Alerts: New Articles
A.M. Best Co. has commented that the financial strength rating of A+ (Superior) and issuer credit ratings (ICR) of "aa -" of ING Canada Group are unchanged following the announcement.— Canadian Underwriter - Headline News
In case you don't know, The adaptive aa is more demanding and effective than the Multisampling aa.— TrustedReviews Site-wide Feed

American Heritage Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a month.
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