American Heritage Dictionary
(1)
Century Dictionary
(3)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
Judge me quick, my perspicacity is almost all gone, finished, evaporated ...— Original Signal - Transmitting Digg
"Your perspicacity is amazing, but I will try and not show my sense of it, if it is going to make you stop He smiled; the Inspector smiled: neither understood me Very well then, I will go on; but the non-change of shoes had to be accounted for, Miss Butterworth You are right; and it has been, of course Have you any better explanation to give I had, or thought I had, and the words trembled on my tongue.— That Affair Next Door
But I have understood you at the end of the first day Razumov interrupted her, speaking steadily I assure you that your perspicacity is at fault here What phrases he uses!"— Under Western Eyes
"I assure you that your perspicacity is at fault here."— Under Western Eyes
"Your perspicacity is amazing, but I will try and not show my sense of it, if it is going to make you stop."— That Affair Next Door
Perspicacity has been looked up 588 times, favorited 3 times, listed 94 times, and commented on twice.

Century 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 twice a year.
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