convexo-concave

from WordNet (r) 3.0 (2006)

convexo-concave
    adj 1: convex on one side and concave on the other with the
           convexity being greater than the concavity

from The Collaborative International Dictionary of English v.0.48

Convexo-concave \Con*vex"o-con"cave\ (?or ?), a.
   Convex on one side, and concave on the other. The curves of
   the convex and concave sides may be alike or may be
   different. See {Meniscus}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

bulging \bulging\ adj.
   1. curving or bulging outward. Opposite of {concave}.
      [Narrower terms: {biconvex, convexo-convex, lenticular,
      lentiform}; {broken-backed, hogged}; {convexo-concave};
      {gibbous, gibbose}; {planoconvex}] Also See: {protrusive}.

   Syn: convex.
        [WordNet 1.5]

   2. curving outward.

   Syn: bellied, bellying, bulbous, bulgy, protuberant.
        [WordNet 1.5]

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