A family of brown seaweeds that includes the genus Desmarestia, characterized by feathery fronds and cold-water habitats.
From 'Desmarestia' + '-aceae' (the standard Latin suffix for plant families), following Linnaean taxonomic classification.
The '-aceae' suffix is one of biology's most useful conventions—it instantly tells you you're looking at a plant or fungal family, so even a word you've never encountered before can be understood as 'relatives of desmarestia'!
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