Biologie: oder Philosophie der lebenden Natur für Naturforscher und Aerzte. 6 vols.

Simultaneously with Lamarck, Treviranus coined the term “biology” for the study of living things, and he was the first to use it in a book title. This massive work was a summary of all basic knowledge about the structure and function of living matter. Treviranus wrote that any living creature has the ability to adapt its organization to changing external conditions. Thus both Haeckel and Weismann considered Treviranus to be a precurser of evolution theory, even though Treviranus never explained how changes in organic structures occurred nor how they could become hereditary. Digital facsimile from Biodiversity Heritage Library at this link.