What does phū mean in Latin?

phū, a noun, means “a kind of valerian”.

noun

phū

phū, n. indecl., or phun, = φοῦ,

I. a kind of valerian, Plin. 12, 12, 26, § 45; Scrib. Comp. 176; 177.

phu or fu, interj.,

I. foh! fugh! phu in malam crucem, Plaut. Ps. 5, 2, 5 (Ritschl, fu); cf. Charis. p. 213 P.; Prisc. p. 1024 ib.