ˈpīlə noun
( plural pylas -ləz ; or py·lae -(ˌ)lē)
Etymology: New Latin, from Greek pylē gate
: 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
• py·lar -lə(r) adjective