noun se·ne·cio \si-ˈnē-sh(ē-ˌ)ō\
plural se·ne·cios

Definition of SENECIO

:  any of a large genus (Senecio) of widely distributed composite plants that have alternate or basal leaves and flower heads usually with yellow ray flowers

Origin of SENECIO

New Latin, from Latin, old man, groundsel (from its hoary pappus), from sen-, senic-, senex old man
First Known Use: 1562


noun se·ne·cio \si-ˈnē-sh(ē-ˌ)ō\   (Medical Dictionary)

Medical Definition of SENECIO

capitalized :  a genus of widely distributed plants (family Compositae) including some containing various alkaloids which are poisonous to livestock
plural se·ne·cios :  any plant of the genus Senecio


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