echinoderm

The term 'echinoderm' is a modern scientific Latin construction, directly assembled from Greek roots in the 19th century to describe a specific phylum of marine animals. The first element, echino-, derives from the Greek word for hedgehog (echinos), which was extended to refer to the spiny sea urchin, perfectly capturing the characteristic prickly exterior of many members of this group. The second element, -derm, originates from the Greek derma, meaning skin, referring to the organism's outer covering or body wall. Thus, the word's literal meaning, "spiny-skinned," provides a transparent and logical anatomical description of the animals it classifies, elegantly linking the ancient Greek imagery of the hedgehog to modern zoological taxonomy.

Structure: echino (spiny) + derm (skin) echino: From Greek echinos (hedgehog, sea urchin, something spiny). In this word, it functions as a combining form meaning "spiny" or "prickly". derm: From Greek derma (skin). In this word, it functions as a combining form meaning "skin".