pel·li·to·ry 2 
(pĕlĭ-tôr′ē)
(pĕlĭ-tôr′ē)n. pl. pel·li·to·ries
A small Mediterranean plant (Anacyclus pyrethrum) in the composite family, containing a volatile oil formerly used for the relief of toothache.
[Middle English peletori, alteration (influenced by paritarie, plant of the genus Parietaria); see PELLITORY1 of peletre, from Old French piretre, peletre, from Latin pyrethrum; see PYRETHRUM.]