Relating to or denoting plants of a group that comprises the onions and other alliums.‘About 40 days afterward a thin slice is cut off transversely from its top, and a milky juice of a fetid, alliaceous odor gradually exudes.’
- ‘Russian exports of onions, shallots, garlic, leeks and other alliaceous vegetables, fresh or chilled, went down by 21%.’
Mid 18th century from modern Latin alliaceus, from Latin allium ‘garlic’ + -aceous; compare with the modern Latin taxonomic family name Alliaceae.
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