Definition of "abiogenesis"

And thus the hypothesis that living matter always arises by the agency of pre-existing living matter, took definite shape; […] It will be necessary for me to refer to this hypothesis so frequently, that, to save circumlocution, I shall call it the hypothesis of Biogenesis; and I shall term the contrary doctrine—that living matter may be produced by not living matter—the hypothesis of Abiogenesis.

1870 September 17, [Thomas Henry Huxley], “The President’s Address”, in The Athenæum: Journal of English and Foreign Literature, Science, the Fine Arts, Music and the Drama, number 2238, London: Printed by Edward J. Francis, Took's Court, Chancery Lane, published at the office, 20, Wellington Street, Strand, W.C., by John Francis. [...], page 374, columns 2–3

The assertion of [Louis] Pasteur is justified, that the onus probandi [burden of proof] lies with abiogenesists, since there is no experience of any living form more than 1⁄1000 of an inch in diameter springing to life out of inorganic matter; it is therefore vastly improbable (needing most cogent evidence to prove), that any form less than 1⁄1000 of an inch in size can be made to spring into life from inorganic matter. While abiogenesis is unproved, we hold to the conclusion that vital force is not the mere outcome or resultant of any or all of the other cosmic forces.

1872 October 3, “Societies and Academies: Philadelphia”, in Nature: A Weekly Illustrated Journal of Science, volume VI, London, New York, N.Y.: Macmillan and Co., page 472, column 2

Life began. There was one abiogenesis when something happened to turn inanimate matter into animate cells. And it happened only once. There are no abiogeneses today. Human life is continuous. Human persons are discontinuous and individual.

1971, Cyril C. Means, Jr., Congressional Record: Proceedings and Debates [...], volume 117, part 23, Washington, D.C.: U.S. Government Printing Office, page 30820, column 3

According to [Carl] Nägeli, the highest forms have evolved from the oldest cells produced through abiogenesis, and the lower forms are, depending on their position in the hierarchy, the descendants of respectively more recent abiogenesis.

1997, Eric Voegelin, “Race as Biological Unit”, in Ruth Hein, transl., edited by Klaus Vondung, Race and State: Translated from the German (The Collected Works of Eric Voegelin; 2), Baton Rouge, La., London: Louisiana State University Press, part I (The Systematic Content of Race Theory), page 45

Although abiogenesis, the spontaneous creation of a living system under appropriate conditions, must have occurred at the end of the prebiotic world, spontaneous generation of life no longer occurs.

2014, G. Bradley Schaefer, James N. Thompson, Jr., “Genetics: Unity and Diversity”, in Medical Genetics: An Integrated Approach, New York, N.Y.: McGraw-Hill Education, page 3