cephalisation

/S EH1 F AH0 L AH0 S EY1 SH AH0 N/

noun

1
An evolutionary trend in which the neural and sense organs become centralized at one end (the head) of an animal.
2
The redistribution of blood flow from the base of the lung towards the upper lobe vessels as a consequence of pulmonary venous hypertension, usually described on a chest radiograph.

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