1. Any of various annuals of the genus Amaranthus having dense green or reddish clusters of tiny flowers and including several weeds, ornamentals, and food plants. Also called pigweed. 2. An imaginary flower that never fades. 3. A deep reddish purple to dark or grayish, purplish red. 4. A dark red to purple azo dye.
New Latin Amaranthus, genus name, alteration of Latin amarantus, from Greek amarantos, unfading : a-, not; see a–1 + marainein, to wither; see mer- in Appendix I.