\As`a*fet"i*da\, Asafoetida \As`a*f[oe]t"i*da\, n. [Asa + L. foetidus fetid.] The fetid gum resin or inspissated juice of a large umbelliferous plant ({Ferula asaf[oe]tida}) of Persia and the East Indies. It is used in medicine as an antispasmodic. [Written also {assaf[oe]tida}.]