Describing snails or mollusks that have a distinctly circular or round mouth opening as their defining feature.
From cyclostoma + Latin '-ous' (full of, having the quality of), creating an adjective that describes the possession of a round mouth structure.
Adding '-ous' to scientific terms creates beautiful precision—'cyclostomatous' doesn't just mean 'snail,' it specifically means 'the kind with that special round mouth feature.'
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