Definition of pruinose in US English:

pruinose

adjective

Botany
  • (of a surface, such as that of a grape) covered with white powdery granules; frosted in appearance.

    • ‘Main branches have a pruinose bark; twigs are either glabrous, pruinose or hairy. Phyllodes are greyish-green or glaucous, occasionally pruinose.’
    • ‘In L. forcipatus, it was completely pruinose (covered ventrally, laterally and dorsally) 72.5% of the time; L. disjunctus was never completely pruinescent, and never covered dorsally.’

Origin

Early 19th century: from Latin pruinosus, from pruina ‘hoar frost’.

Pronunciation

pruinose

/ˈpro͞oəˌnōs/