calcium-channel

The term is a modern scientific compound, combining the name of a chemical element with a word for a passageway. 'Calcium' originates from the Latin calx, meaning limestone, as the metal was first isolated from lime. 'Channel' traces back to the Latin canalis, referring to a pipe or watercourse. In the 20th century, with advances in cell biology and electrophysiology, these roots were fused to create a precise term for the transmembrane protein structures that selectively permit calcium ions to flow into cells, crucial for functions like muscle contraction and neuronal signaling. The compound thus logically describes a dedicated conduit for calcium ions.

Structure: calcium + channel - calcium: From Latin calx (limestone, lime). The element name derived from the Latin word for lime. - channel: From Old French chanel, from Latin canalis (pipe, groove, channel). The morpheme denotes a passage or conduit.