Relating to or belonging to the Amygdalaceae plant family; resembling or characteristic of almonds or almond-bearing plants.
From Amygdalaceae + -ous (adjective suffix). This adjectival form describes plants that belong to the almond/stone fruit family.
When botanists say something is 'amygdalaceous,' they're telling you it's part of this huge family of fruit trees—and if it has an amygdalin compound, you probably want to be careful eating the seeds!
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