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natural:opening,
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structural:opening,
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isolated:tissue,
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natural:aperture,
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significant:structure,
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outside:water,
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small:opening,
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small:orifice,
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structural:feature,
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superficial:feature,
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morphological:structure,
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cellular:tissue,
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vegetative:structure,
Category Nuances for stoma:
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superficial,
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natural,
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structural,
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isolated,
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outside,
-
cellular,
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morphological,
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small,
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significant,
-
vegetative,
Simple Categories for stoma: