1. (of an insect with aquatic young) undergoing incomplete metamorphosis in which the young does not resemble the adult
   - hemimetabolous, hemimetamorphous, hemimetamorphic

See also: hemimetabolism, metamorphic

• flat rate
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• flat tire
• flat tyre
• flat wash
• flat-bellied
• flat-chested
• flat-coated retriever
• flat-footed
• flat-growing
• flat-hat
• flat-leaf parsley
• flat-pack
• flat-topped
• flat-topped white aster
• flatbed
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• flatbrod