In botany, relating to or having the nature of berries; berry-like in appearance or structure.
From Latin 'baca' meaning 'berry' plus the suffix -aceous meaning 'of the nature of' or 'belonging to.' This is a technical term that botanists use to describe fruits with a berry-like character.
Botanists use -aceous for tons of technical terms (herbaceous, farinaceous), so 'baccaceous' is their precise way of saying 'this fruit acts like a berry even if we don't call it one'—it's classification through terminology.
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