(organic chemistry) An alkaloid found in ragwort (Jacobaea vulgaris).

(organic chemistry) A pyrrolizidine alkaloid.

(organic chemistry) A chemical compound, C₁₈H₂₃NO₇, isolated from Senecio cannabifolius.

(dated or rare) Alternative spelling of seneschal

(medicine) Seneca root

plural of seneschalty

The office of seneschal. / The term of office of a seneschal.

Of or relating to Seneca the Younger, Lucius Annaeus Seneca (ca. 4 BC–AD 65), Roman philosopher and statesman.

plural of seneschalship

Quality of being Senegalese.