DictionaryRoot: larva
Latin
larva
ghost; mask
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adjective
larval
LAR-vul/ˈlɑːrvl/
Relating to an animal's immature larva stage before adulthood.
Etymology
Latin larva meant both a ghost and a mask. Immature animals were called larvae because their unlike appearance was seen as masking the adult form, giving larval its zoological meaning.