SHIM

noun

1. A wedge.
2. A thin piece of material, sometimes tapered, used for alignment or support.
3. A small library that transparently intercepts and modifies calls to an API, usually for compatibility purposes.

verb

1. To fit one or more shims to a piece of machinery.
2. To adjust something by using shims.
3. To intercept and modify calls to (an API), usually for compatibility purposes.