an express passenger train in service between Paris and Istanbul from 1883 until 1977, using various routes. Some or parts of the routes continue to be served by regular service and by rail tours.
- Orienting reflex
orienting reflex n. An aspect of responding to environmental stimuli attending in which an organism’s initial response to a change or novel stimulus makes the organism more sensitive to the stimulation, as when the pupil of the eye dilates in response to dim light. Also called orienting response.
- Orienting response
orienting response n. See orienting reflex.
open reduction internal fixation
[awr-uh-fis, or-] /ˈɔr ə fɪs, ˈɒr-/ noun 1. an opening or aperture, as of a tube or pipe; a mouthlike opening or hole; mouth; vent. /ˈɒrɪfɪs/ noun 1. (mainly Technical) an opening or mouth into a cavity; vent; aperture n. early 15c., from Middle French orifice “the opening of a wound” (14c.) and directly from […]