In taxonomy, having thread-like structures or antennae; relating to organisms with filiform (thread-shaped) characteristics.
From Latin filum (thread) plus the adjective suffix '-osus' (full of). Used in biological classification since the 18th century.
Scientists use the word 'filosa' to describe creatures like certain crustaceans whose feathery antennae look delicate but are actually packed with sensory receptors more sophisticated than human fingertips.
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