fəˈselə noun
also phacel·lus -ləs
( plural phacel·lae -ˌlē, -ˌlī ; also phacel·li -ˌlī)
Etymology: New Latin, from Greek phakellos, MS variant of phakelos bundle, faggot
: one of the rows of filaments usually bearing nematocysts on the inner surface of the gastric cavity of some scyphozoan jellyfishes