quadruplex

adjective

quad·​ru·​plex

ˈkwädrəˌpleks

: being or relating to a system of telegraphy by which two messages in each direction may be sent simultaneously over one wire

Word History

Etymology

Latin quadruplic-, quadruplex fourfold, from quadri- + -plic-, -plex -fold

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!