(transformational grammar) the principle that a noun phrase may take with it the rest of a prepositional phrase or a larger noun phrase in which it is contained, when moved in a transformation. For example, when the interrogative pronoun is moved to initial position, other words are moved too, as in to whom did you speak?
piedra pi·e·dra (pē-ā’drə) n. A fungal disease of the hair marked by small black or white nodular masses.
[pye-th rahs ne-grahs] /ˈpyɛ ðrɑs ˈnɛ grɑs/ noun 1. a city in N Mexico, on the Rio Grande.
- Pied shag
noun 1. a large New Zealand seabird, Phalacrocorax varius, with a white throat and underparts Also called karuhiruhi
- Pied wagtail
noun 1. a British songbird, Motacilla alba yarrellii, with a black throat and back, long black tail, and white underparts and face: family Motacillidae (wagtails and pipits)