Ametabolic \A*met`a*bol"ic\, Ametabolous \Am`e*tab"o*lous\, a. (Zool.) Not undergoing any metamorphosis; as, ametabolic insects. Opposite of metabolic. [1913 Webster]

2. undergoing only slight metamorphosis [WordNet 1.5]

Source: The Collaborative International Dictionary of English v.0.48
 

ametabolic adj
1: undergoing slight or no metamorphosis [syn: ametabolous] [ant: metabolic]
2: undergoing no (or only slight) metamorphosis

Source: WordNet (r) 2.0
 

Ametabolic \A*met`a*bol"ic\, Ametabolous \Am`e*tab"o*lous\, a. (Zo["o]l.) Not undergoing any metamorphosis; as, ametabolic insects.

Source: Webster's Revised Unabridged Dictionary (1913)