Hypertext Webster Gateway: "rictus"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Rictus \Ric"tus\, n. [L., the aperture of the mouth.]
The gape of the mouth, as of birds; -- often resricted to the
corners of the mouth.
From WordNet (r) 1.7 (wn)
rictus
n : a gaping grimace
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