The Teilhard Lexicon has been written to enable researchers and students to better understand the specialized language of Teilhard's transdisciplinary approach, which he found himself compelled to develop as a means of expressing that extraordinary vision of a universe in process of convergence towards a cosmic center of unity he identifies with the Cosmic Christ. All quotations in the lexicon have been sourced from the French originals. The work includes a full bibliography of Teilhard's works in French and English.