se·​ne·​cio si-ˈnē-sh(ē-ˌ)ō How to pronounce senecio (audio)
plural senecios
: 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

Example Sentences

Recent Examples on the Web The nursery grows more than 650 varieties including many different kinds of haworthia, kalanchoe, senecio, aeonium and sedum. Debbie Arrington, sacbee, 15 Dec. 2017 Her bouquet was made of white calla lilies, silver senecio, lily of the valley, hydrangeas. Michelle Darrisaw, Southern Living, 13 Oct. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'senecio.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


New Latin, from Latin, old man, groundsel (from its hoary pappus), from sen-, senic-, senex old man

First Known Use

1562, in the meaning defined above

Time Traveler
The first known use of senecio was in 1562

Dictionary Entries Near senecio

Cite this Entry

“Senecio.” Dictionary, Merriam-Webster, Accessed 1 Jun. 2023.

Medical Definition


se·​ne·​cio si-ˈnē-sh(ē-ˌ)ō How to pronounce senecio (audio)
capitalized : a genus of widely distributed plants (family Compositae) including some containing various alkaloids which are poisonous to livestock
plural senecios : any plant of the genus Senecio
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