Of or relating to grapevines or the botanical family containing grapevines and similar climbing plants.
From Greek 'ampelos' (grapevine) plus '-eous' (an adjectival suffix), an older or less common variant of 'ampelidaceous' with identical meaning but different formation.
Different scientific terms like 'ampelideous' and 'ampelidaceous' coexist in English, showing how scientific language evolves—older forms persist even as standardized terminology becomes more universal.
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