Carl Darling Buck (October 2, 1866 – February 8, 1955) was an American philologist.

[1] In 1892 he became professor of Sanskrit and Indo-European comparative philology at the University of Chicago,[1] and was later named Martin A. Ryerson Distinguished Service Professor of Comparative Philology.

In his early career, he concentrated on the Italic dialects, including among his published work, Der Vocalismus der oskischen Sprache (1892), The Oscan-Umbrian Verb-System (1895), and Grammar of Oscan and Umbrian, with a collection of inscriptions and a glossary (1904), and a précis of the Italic languages in Johnson's Universal Cyclopaedia.

His Dictionary of Selected Synonyms in the Principal Indo-European Languages was called by Calvert Watkins "a treasure house of words, word origins, expressions, and ideas..., a monument to a great American scholar".

[5][6] Upon his death, the New York Times reported that Buck spoke 30 languages.