membrane
Meaning
A thin, soft, flexible layer of tissue or material that covers, lines, separates, or connects parts inside a living thing or a structure.
A thin, flexible sheet or layer of any material.
Structure
Usage
The cell membrane controls the movement of substances in and out of the cell.
A thin plastic membrane was used as a waterproof barrier in the construction.
The tympanic membrane, or eardrum, vibrates in response to sound waves.
Etymology
The word 'membrane' traces its lineage to the Latin membrāna, meaning "parchment, skin covering a body part," which itself derives from membrum (limb). The conceptual link is that a membrane is a thin layer or skin that covers or encloses a part, much like parchment (made from animal skin) or the natural covering of a limb. This Latin term passed into Middle English via Old French. The modern abstract meaning retains the core idea of a thin, pliable sheet that serves as a boundary or covering for a structure, whether biological or artificial.
Analysis
'membr' originates from Latin membrum, meaning "limb, member, or part of the body." 'ane' is a variant of the Latin-derived suffix '-ana', often used to form nouns, here indicating a thing related to or characterized by the root.