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Webster 1913 Edition

Noun.

[Chinese, green dragon.]

A fragrant variety of black tea having somewhat the flavor of green tea.

[Written also

oulong

oolong ‎(countable and uncountable, plural oolongs)

A partially fermented tea which combines the characteristics of green tea and black tea.
- 1994, A. Varnam, ‎J. M. Sutherland, Beverages: Technology, Chemistry and Microbiology (page 187)
  Flavour and aroma of semi-fermented teas is dictated by the extent of fermentation and, for this reason, oolong has a considerably stronger flavour than pouchong, which undergoes a significantly shorter fermentation.

oolong tea — see oolong tea

oolong m ‎(plural oolongs)