An early embryonic stage in some organisms where the blastula develops with features involving both ends or sides.
From Ancient Greek 'amphi-' (both) + 'morula' (a berry-shaped embryonic stage). This embryological term describes a specific developmental configuration.
Embryology uses lots of 'amphi-' words because development is literally symmetric—babies grow with both left and right sides, both front and back, both inside and outside layers.
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