rudimentary
Contents
English Expression
  1. adj.:  rudimentary,  unformed,  existing in an imperfect or undeveloped form,  not highly developed,  basic in structure or function
Thesaurus
not Totally Fashioning of, inchoate, hypogenetic, puny
dystrophic, abortive, recessive, recursive, regressive, auxesis callow, remnant
Containing Phrases
part or organ that is incompletely developed