horizon

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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

any layer of soil that is distinguishable when soil is examined in vertical sections.
References in periodicals archive ?
In order to calculate the apparent horizon of the cosmology, we use the FRW metric to describe the spatially homogeneous and isotropic Universe [1, 19]
that is a kinematic equation of the cosmical apparent horizon.
(16), (18), and (19) are the holographic-style dynamical equations of the cosmical apparent horizon [14], which means the evolution of Universe has a relation with the cosmical apparent horizon.

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