"bilberry" in the noun sense
1. bilberry, whortleberry, whinberry, blaeberry, Viccinium myrtillus
erect European blueberry having solitary flowers and blue-black berries
2. bilberry, thin-leaved bilberry, mountain blue berry, Viccinium membranaceum
erect blueberry of western United States having solitary flowers and somewhat sour berries
3. bilberry, whortleberry, European blueberry
blue-black berries similar to American blueberries
Source: WordNet® (An amazing lexical database of English)
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