coupler noun. ['kʌplǝ] M16.
[from COUPLE verb + -ER¹.]
1. A person who couples, or couples things together. M16.

2. A thing that couples or links things together; spec. a device in an organ, harpsichord, etc., for connecting two manuals, a manual with a pedal, or two keys, so that both can be played with a single motion. M17.

3. Photography. A compound in a developer or an emulsion which combines with the products of development to form an insoluble dye, part of the image. M20.

4. In full acoustic coupler. A modem which converts digital signals from a computer into audible sound signals and vice versa, so that the former can be transmitted and received over telephone lines. M20.

■ coupleress noun (rare) a female coupler; a procuress: M19.

[TahlilGaran] English Dictionary ▲