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youth-and-old-age

American  
[yooth-uhn-ohld-eyj, -uhnd] / ˈyuθ ənˌoʊldˈeɪdʒ, -ənd /

noun

  1. a stiff-growing, erect composite plant, Zinnia elegans, of Mexico, having large, solitary flowers with yellow-to-purple disks and usually red rays.


Etymology

Origin of youth-and-old-age

An Americanism dating back to 1890–95