You know what it looks like… but what is it called?
TAKE THE QUIZ“suprachiasmatic”
We have one entry that includes the term suprachiasmatic.
suprachiasmatic nucleus
noun: either of a pair of neuron clusters in the hypothalamus situated directly above the optic chiasma that receive photic input from the retina via the optic nerve and that regulate the body's circadian rhythms
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Merriam-Webster unabridged