D defs.my
Entry 2 senses Webster, 1913

Rudimentary

/ro͞odˌ-əm-ĕn'-tẽr-ē/ · Ru·di·men·ta·ry · IPA /ˌɹuːdɪˈmɛntəɹi/
01 a. Of or pertaining to rudiments; consisting in first principles; elementary; initial; as, rudimental essays.
  1. 1.
    Of or pertaining to rudiments; consisting in first principles; elementary; initial; as, rudimental essays.
  2. 2.
    Very imperfectly developed; in an early stage of development; embryonic.(Biol.)