Definitions:

1. In real estate, refers to a building that is divided into four separate units or apartments, where each unit can be occupied by different families or individuals. ADJECTIVE
   • The investor purchased a quadruplex to generate rental income from four separate tenants.
2. In telecomunications, can describe a communication system where four distinct signals or channels are transmitted simultaneously over the same medium. ADJECTIVE
   • The quadruplex system allowed multiple messages to be sent across a single telegraph line at once.
3. In video recording technology, was an early type of video recording system that used large reels of magnetic tape and was widely used in the television industry starting in the 1950s. ADJECTIVE
   • Early television programs were recorded using quadruplex video tape recorders, which revolutionized broadcasting.

Synonyms:

• biquadratic
• fourfold