Source : Webster's Revised Unabridged Dictionary (1913)

Rosicrucian \Ros`i*cru"cian\, n. [The name is probably due to a
   German theologian, Johann Valentin Andre["a], who in
   anonymous pamphlets called himself a knight of the Rose Cross
   (G. Rosenkreuz), using a seal with a St. Andrew's cross and
   four roses.)]
   One who, in the 17th century and the early part of the 18th,
   claimed to belong to a secret society of philosophers deeply
   versed in the secrets of nature, -- the alleged society
   having existed, it was stated, several hundred years.

   Note: The Rosicrucians also called brothers of the Rosy
         Cross, Rosy-cross Knights, Rosy-cross philosophers,
         etc. Among other pretensions, they claimed to be able
         to transmute metals, to prolong life, to know what is
         passing in distant places, and to discover the most
         hidden things by the application of the Cabala and
         science of numbers.

Rosicrucian \Ros`i*cru"cian\, a.
   Of or pertaining to the Rosicrucians, or their arts.