adj.not derived; primary or simple

Underived event nouns in French
Consciousness is Underived Intentionality
Consciousness is Underived Intentìonality
The semantics of underived event nouns in French
The prosody of Swedish underived nouns: No lexical tones required
Principles of English Stress: The stress of underived items
Argument structure and morphologically underived nouns in Spanish and English
Characterization of underived nucleotides by mass spectrometry using the MBSA-FAB ionization method
Molecular Integral for the Double Electron-Repulsion Potential: A Closed Form Underived for Forty Years
Exclusion of the Polyarthra from Harpacticoida and its reallocation as an underived branch of the Copepoda (Arthropoda, Crustacea)