Did you possibly mean one of these? incus, onces, onus
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Palynology
List of terms used in the study and classification of pollen and spores - both fossil and modern.
tetrad, abporal, ectoaperture, lacuna, grain, spore, lophate, acalymmate, monad, polyad, hexad, calymmate and 513 more...
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hernesheir In palynology, also Zwischenkörper, a lens-shaped structure that is not resistant to acetolysis and that lies beneath the apertures of many kinds of pollen grains - those of Corylus (hazelnut) for example. Dec 13, 2010