nutlet noun2 •A small nut.Other maloid genera with hard nutlets are Cotoneaster, Hesperomeles, Osteomeles, and Pyracantba, but each of these is quite different from Mespilus and Crataegus. — 2003 •One of the lobes or sections of the mature ovary of some members of the Boraginaceae, Verbenaceae, and Lamiaceae. formsnutlets