Definition of vug in English:

vug

noun

Geology
  • A cavity in rock, lined with mineral crystals.

    • ‘Veins in some septaria do not fill the fractures completely but form elongated vugs that are sometimes lined with well-formed crystals.’
    • ‘The banded quartz is fascinating to study; euhedral crystals originally deposited in vugs and cavities were repeatedly covered with thin bands of agate.’
    • ‘Cavities or vugs in the centre of the veins make it possible for minerals to grow into free space forming large and well-formed crystals.’
    • ‘It occurred as a fine-grained siliceous vein filling and as discrete, clear, tiny crystals in vugs.’
    • ‘Very narrow vugs containing quartz crystals are encountered in the quartz seams at times, but these invariably are barren of gold.’
    space, chamber, hollow, hole, pocket, pouch
    View synonyms

Origin

Early 19th century: from Cornish vooga.

Pronunciation:

vug

/vʌɡ/