horizon

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horizon

[hôrī′zən]

Etymology: Gk, horizein, to encircle

a specific stage of human embryonic development determined by the appearance and ultimate formation of certain anatomic characteristics. The classification comprises 23 stages, each lasting 2 to 3 days, beginning with the fertilization of the ovum and ending 7 to 9 weeks later with the initiation of the fetal period of intrauterine life.

horizon [hŏ-ri´zon]

a specific anatomic stage of embryonic development, of which 23 have been defined, beginning with the unicellular zygote (fertilized egg) and ending 7 to 9 weeks later with the beginning of the fetal stage.

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anterior neuropore Broca's plane clinical horizon coronal plane developmental horizon Donders' law frontal plane guide plane horizontal horizontal plane illusion median plane midsagittal plane Moon Illusion motion sickness Nausea and Vomiting neuropore occlusal plane orbital plane			Hop with the Hip HOPE hope inspiration hopeless Hopelessly Bad Samaritan hopelessness Hopkins Hoplocephalus bungaroides Hoplodontophorus Hoplophobe Hoplophobia Hoplophobic Hoplopleura hopped up Hoppengarten cough hopping hopples hops hor. decub. hor. som. horary points hordenine hordeolum Hordeum horehound horizon horizontal horizontal abdominal position horizontal angulation horizontal bone loss horizontal fissure of cerebellum horizontal fissure of the right lung horizontal fracture Horizontal Gluteal Crease horizontal integration horizontal maxillary fracture horizontal overlap horizontal plane horizontal plane postural decompensation horizontal position horizontal pursuit horizontal resorption horizontal scrub horizontal transmission horizontal vertigo horizontal violence horizontalis horm- Hormel pigs hormesis hormic psychology			Horem-akhet Horem-akhet Horemeheb Horemheb Horen, Zien & Zwijgen HoReq Horeshoe Crab Horeshoe Crab Horg Horgan, Paul Horgen Horgen (Zurich) Horgen (Zürich) Horgen ZH Horgen, Switzerland Hori Hori Real Arcade Pro Horia Lovinescu HORIBA Jobin Yvon Horicon Marsh Horicon National Wildlife Refuge Horii Oral Nasal Coupling Horishima Horishima Horite Horites HORIZ horizon Horizon (black hole) Horizon (black hole) Horizon Academy at Marion Oaks Horizon Air Horizon analysis horizon bar Horizon Blue Cross Blue Shield Horizon Business Concepts, Inc. Horizon Business Insight Horizon Cellular Telephone Company Horizon Central Athletic Association Horizon Christian Academy Horizon Christian Fellowship Horizon Clinicals Infrastructure horizon cloth Horizon College of San Diego Horizon Community Learning Center Horizon Construction Management Ltd. Horizon coordinate system Horizon coordinate system Horizon Crossing Indicator Horizon Digital SATELLITE Meter Horizon Digital Terrestrial Meter horizon distance Horizon Emergency Care Horizon Energy Distribution Limited

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horizon