Cheval-de-frise

she-val′-de-frēz, n. a piece of timber armed with spikes, used to defend a pa age or to stop cavalry:— pl. Chevaux-de-frise (she-vō′-). — n. Cheval′-gla , a large gla or mirror supported on a frame. [Fr.,— cheval , horse; Frise , Fries land.]