Hypertext Webster Gateway: "appreciable"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Appreciable \Ap*pre"ci*a*ble\, a. [Cf. F. appr['e]ciable.]
Capable of being appreciated or estimated; large enough to be
estimated; perceptible; as, an appreciable quantity. --
{Ap*pre"ci*a*bly}, adv.
From WordNet (r) 1.7 (wn)
appreciable
adj : enough to be estimated or measured; "appreciable amounts of
noxious wastes are dumped into the harbor"
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