An alternate spelling of gastrodisc; the disk-shaped digestive region in simple organisms.
Variant spelling of gastrodisc, using English 'disk' spelling instead of 'disc.' Both forms are acceptable in modern medical terminology, reflecting American versus British English conventions.
The existence of both 'disc' and 'disk' spellings shows how American and British English split from each other—the Greek-Latin terms stayed the same, but English speakers disagreed on how to write it!
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