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

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

Examples of senecio in a Sentence

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 example sentences are selected automatically from various online news sources to reflect current usage of the word 'senecio.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of senecio

1562, in the meaning defined above

History and Etymology for senecio

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

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Time Traveler for senecio

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The first known use of senecio was in 1562

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Dictionary Entries Near senecio

senecic acid


senecioic acid

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Cite this Entry

“Senecio.” Dictionary, Merriam-Webster, Accessed 26 Jan. 2022.

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More Definitions for senecio


se·​ne·​cio | \ si-ˈnē-sh(ē-ˌ)ō How to pronounce senecio (audio) \

Medical Definition of senecio

1 capitalized : a genus of widely distributed plants (family Compositae) including some containing various alkaloids which are poisonous to livestock
2 plural senecios : any plant of the genus Senecio


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