An ornamental or functional piece shaped like the letter H, or a component part in machinery or design bearing that form.
From 'aitch' (the letter H) + 'piece' (from Old French 'piece'). Literally a piece or component in the shape of the H letter.
Architectural and mechanical design often references letters and numbers—an 'aitchpiece' is a great example of how form shapes names, and how engineers communicate visually complex shapes by comparing them to simple, universally-known symbols.
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