Noun
The sweet and edible drupes (fruits) of several Mediterranean and African species of small trees, of the genus Zizyphus, especially the Z. jujuba, Z. vulgaris, Z. mucronata, and Z. Lotus. The last named is thought to have furnished the lotus of the ancient Libyan Lotophagi, or lotus eaters.
Source: Webster's dictionaryJujube vinegar, called zaocu or hongzaocu (Zh), and wolfberry vinegar, called gouqicu (Zh), are produced in China. Source: Internet