imago

Etymology

From Latin imāgō. Doublet of image.

noun

1. (entomology) The final developmental stage of an insect after undergoing metamorphosis.
   ‘But still,’ he said to himself, drawing the metamorphoses of a red admiral, egg, caterpillar, chrysalis and imago on his pad, ‘what shall I say to him when we meet?’ 1973, Patrick O'Brian, HMS Surprise
2. (psychology) An idealised concept of a loved one, formed in childhood and retained unconsciously into adult life, the basis for the psychological formation of personality archetypes.