pas·tille 
(pă-stēl) also pas·til (păstĭl)
(pă-stēl) also pas·til (păstĭl)n.
1. A small medicated or flavored tablet; a troche.
2. A tablet containing aromatic substances that is burned to fumigate or deodorize the air.
3. A pastel paste or crayon.
[French, from Spanish pastilla, perfume pellet, and Italian pastillo, pastille, both from Latin pāstillus, little loaf, medicine tablet, diminutive of pānis, bread; see pā- in the Appendix of Indo-European roots.]