What does amaranth mean?
The definition of amaranth
Am”a*ranth, n.
Etym: [L. amarantus, Gr. mortal; — so called because its flowers do not soon wither: cf. F. amarante. The spelling with th seems to be due to confusion with Gr.

1 An imaginary flower supposed never to fade. [Poetic]
2 (Bot.)
A genus of ornamental annual plants (Amaranthus) of many species, with green, purplish, or crimson flowers.
2 A color inclining to purple.