φορμίς
From LSJ
τὸ δ' ἐξαίφνης τὸ ἐν ἀναισθήτῳ χρόνῳ διὰ μικρότητα ἐκστάν → suddenly refers to what has departed from its former condition in a time imperceptible because of its smallness
English (LSJ)
ίδος, ἡ, Dim. of φορμός,
A small basket, Ar.V.58, Alex.310; used for fishing, Arist.HA547a2.
German (Pape)
[Seite 1300] ίδος, ἡ, dim. von φορμός, Körbchen, Ar. Vesp. 58.