a combining form meaning “new,” “recent,” “revived,” “modified,” used in the formation of compound words: neo-Darwinism; Neolithic; neoorthodoxy; neophyte.
2.
Chemistry. a combining form used in the names of isomers having a carbon atom attached to four carbon atoms: neoarsphenamine.
Gk. neo-, comb. form of neos "new," from PIE base newos (see new). Used in a seemingly endless number of adjectives and nouns, mostly coined since c.1880.
