Learn how to say Amaranthaceae correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word amaranth:
1a plant of a chiefly tropical family that includes love-lies-bleeding.
Family Amaranthaceae: several genera, especially Amaranthus
2a purple colour.
mid 16th century: from French amarante or modern Latin amaranthus, alteration (on the pattern of plant names ending in -anthus, from Greek anthos ‘flower’) of Latin amarantus, from Greek amarantos ‘not fading’