(ˌsʌbɪˈmeɪɡəʊ) n, pl-imagoesor-imagines (-ɪˈmædʒəˌniːz) (Zoology) the first winged stage of the mayfly, with dull opaque wings, known to anglers as a dun, before it metamorphoses into the shiny gauzy imago or spinner. See also dun23, spinner6
subimago
subimago
a winged, post-pupal stage of some insects such as EPHEMEROPTERA, which moults into the full imago.