siphunculus
From LSJ
sīphuncŭlus: i, m.
dim. sipho,
I a little pipe from which water springs forth, Plin. Ep. 5, 6, 23; 5, 6, 36.—Also written without the aspirate, sīpuncŭlus, Fronto, Or. 1 med.>
sīphuncŭlus,¹⁵ ī, m., petit tuyau : Plin. Min. Ep. 5, 6, 23.