multilayer aggregate

in polymer crystals
https://doi.org/10.1351/goldbook.M04051
A stack of @L03446@ generated by spiral growth at one or more screw dislocations. The axial displacement over a full turn of the screw (Burgers vector) is usually equal to one lamellar thickness.
Source:
Purple Book, 1st ed., p. 82 [Terms] [Book]