prosopyle
/ˈprɒsəpʌɪl/Zoology
noun
In sponges (other than those having a simple asconoid structure): a minute pore by which water passes from an incurrent canal into a radial canal or flagellated chamber (in which choanocytes trap food particles).
Origin
Late 19th century; earliest use found in William Sollas (1849–1936), geologist and anthropologist. From ancient Greek πρόσω forwards + -pyle.