phellos
Could not find phelli in Logeion dictionaries.
phelli Noun: masculine nominative plural, Noun: masculine vocative plural, Noun: masculine genitive singular of phellos
phellos, i, m., = φέλλος,
- the cork-tree; transf., the part of the water-clock made from it, the cork, Vitr. 9, 8, 5.
phellos, ī, m. (φελλός), die Korkeiche, das Pantoffelholz, meton. die daraus gemachte Drehscheibe in der Wasseruhr, der Kork, die Hohlscheibe, Vitr. 9, 8, 5.
phellŏs, ī, m. (φελλός), tambour de clepsydre [en liège] : Vitr. Arch. 9, 8, 5.