ULTRARED
Source: 567
Ul′tra‐red″ (?), a. [[Pref. ultra- + red.]] (Physics) Situated beyond or below the red rays; as, the ultrated rays of the spectrum, which are less refrangible than the red.
Source: 567
Ul′tra‐red″ (?), a. [[Pref. ultra- + red.]] (Physics) Situated beyond or below the red rays; as, the ultrated rays of the spectrum, which are less refrangible than the red.