Hemimetabola

from WordNet (r) 3.0 (2006)

Hemimetabola
    n 1: subclass of insects characterized by gradual and usually
         incomplete metamorphosis [syn: {Exopterygota}, {subclass
         Exopterygota}, {Hemimetabola}]

from The Collaborative International Dictionary of English v.0.48

Hemimetabola \Hem`i*me*tab"o*la\, n. pl. [NL. See {Hemi-}, and
   {Metabola}.] (Zool.)
   Those insects which have an incomplete metamorphosis.
   [1913 Webster]

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