horizon

(redirected from radar horizon)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia.
Related to radar horizon: Over the horizon radar

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.

horizon

[hôrī′zən]
Etymology: Gk, horizein, to encircle
a specific stage of human embryonic development determined by the appearance and ultimate formation of certain anatomical 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

any layer of soil that is distinguishable when soil is examined in vertical sections.
References in periodicals archive ?
The team working on the new architecture recently completed the first two tests, which confirmed that CEC with Milstar II satellite range extension enables Aegis cruisers to defend against air breathing threats beyond their own radar horizons.
In 2006 Sanswire Networks (whose parent company is GlobeTel Communications) unveiled a 75-metre-long technology demonstrator for its Stratellite solar-powered communications platform, which was designed to cruise autonomously or as a remotely-piloted system at up to 65,000 ft, giving a radar horizon at around 300 nm.
The advantages of using a business jet include the absence of underwing engines (which can obstruct radar scan) and a higher ceiling capability, giving a longer distance to the radar horizon and reduced loss of imagery in mountain shadows.