A hand-like fin or wing structure; the anatomical term for the modified limb of a bat or similar creature with hand-like appendages.
From Greek 'cheir' (hand), 'pteron' (wing), and the suffix '-ium' (anatomical structure). This Latin/Greek hybrid follows the pattern of anatomical terminology like 'cranium' or 'thoracium.'
Scientists literally named bat wings 'hand-wings' (chiropterygium) in Latin, but we still call them just 'wings'—it's a reminder that older, more descriptive names sometimes lose out to simpler, catchier terms!
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