Having the structure, arrangement, or characteristics of a corymb; producing corymbs.
From corymb plus Latin -osus suffix meaning 'full of' or 'characterized by,' similar to 'verbose' (full of words) or 'joyous' (full of joy).
The -osus suffix is one of the most productive Latin endings in botanical terms—when you see it, you know the thing is 'really' characterized by that feature. A corymbose plant isn't just *having* corymbs; it's basically *made of* corymbs, suggesting abundance and prominence of that structure.
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