The Collaborative International Dictionary of English v.0.48:

Exiguity \Ex`i*gu"i*ty\, n. [L. exiguitas, fr. exiguus small:
   cf. F. exiguit['e].]
   Scantiness; smallness; thinness. [R.] --Boyle.
   [1913 Webster]

WordNet (r) 3.0 (2006):

exiguity
    n 1: the quality of being meager; "an exiguity of cloth that
         would only allow of miniature capes"-George Eliot [syn:
         meagerness, meagreness, leanness, poorness,
         scantiness, scantness, exiguity]