Galeus

Part of speech: noun

Definitions

1. A genus of sharks, known for their distinctively flattened heads and often found in both temperate and tropical waters
2. Characterized by their elongated bodies and compressed shape, members of this group are adapted for swimming in open oceans
3. This group includes species commonly referred to as hammer-headed sharks, notable for their unique head structure and hunting behavior

Etymology: Ancient Greek writers used "galeos" for a kind of small shark, probably a dogfish, and the name passed into Latin as "galeus." Its origin is the Greek "galē," meaning weasel. Why a shark would be named after a weasel is not firmly recorded, so any explanation would be guesswork. The same root gave Latin "galea," meaning helmet, through Greek "galeē," a cap made of weasel skin. The helmet and the shark therefore share a Greek ancestor meaning weasel, though they became separate words long before English existed. As a scientific name, "Galeus" was applied to a genus of sharks in the early nineteenth century, when naturalists were assigning Latin and Greek names to newly described species.