The botanical family that contains horsetail plants; a family of vascular plants characterized by jointed, hollow stems with whorled leaves.
From 'equisetum' + '-aceae' (botanical family suffix). This is a scientific taxonomy term for the horsetail plant family.
The Equisetaceae family is remarkable because it's the last surviving family of an ancient group—their closest relatives were the massive tree-horsetails that dominated Carboniferous swamps 300 million years ago!
Complete word intelligence in one call. Free tier — 50 lookups/day.