An alternative spelling of entocoel; a body cavity formed through internal development.
From Greek 'entos' (within) plus 'koilos' (hollow); the '-oele' spelling variant is common in older or British scientific texts. This represents spelling variation rather than different meanings.
The '-coel' vs '-coele' spelling battle is a great example of how scientific terms got standardized—British scientists preferred 'coele,' Americans preferred 'coel,' and modern biology chose the simpler version!
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