amorphous shape

English Thesaurus

1. an ill-defined or arbitrary shape (noun.shape)

hypernym	:	form, shape,
definition	:	the spatial arrangement of something as distinct from its substance (noun.tops)

hyponym	:	shapelessness,
definition	:	an amorphous or indefinite shape (noun.shape)

hyponym	:	blob,
definition	:	an indistinct shapeless form (noun.shape)

hyponym	:	space,
definition	:	an empty area (usually bounded in some way between things) (noun.shape)