Dusky brown and transparent or glassy in appearance; having a brownish tint while remaining somewhat clear.
Compound of Latin 'fuscus' (dark brown) and 'hyaline' (from Greek 'hyalos' meaning glass or transparent), used in scientific descriptions.
This word perfectly describes certain insect wings and mineral specimens—they're brown enough to look serious but clear enough to see through, which is weirdly specific but perfect for taxonomy.
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