rima

from WordNet (r) 3.0 (2006)
rima
    n 1: a narrow elongated opening or fissure between two
         symmetrical parts
from The Collaborative International Dictionary of English v.0.48
Rima \Ri"ma\, n.; pl. {Rimae}. [L.] (Anat.)
   A narrow and elongated aperture; a cleft; a fissure.
   [1913 Webster]
antiflux / dictionary / rima
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