pyla
noun
py·la
ˈpīlə
plural pylas
-ləz
or pylae
-(ˌ)lē
: the opening from the third ventricle into the aqueduct of Sylvius in higher vertebrates including man
also
: a corresponding opening on either side from the cavity of the optic lobe in some lower vertebrates
pylar
adjective
-lə(r)
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Merriam-Webster unabridged
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