Abstract 1 Introduction 2 Nonkinship terms 2.1 Terms derived from verbs 2.2 Unpossessed nouns 3 Kinship terminology 3.1 Grandkinsman terms 3.2 Parent and child terms 3.3 Sibling terms 3.4 Collateral parent and child terms 3.5 Affinal terms 4 Reference to deceased persons Appendix: Kinship Terms References 1 The Seri people live along the mainland coast of the Gulf of California in Sonora, Mexico. For more information on the people and culture, see Felger and Moser 1985 and the references cited there. This paper is based on data collected primarily by the first author and her husband since 1952. A primary source of information has been Roberto Herrera Marcos, for whose invaluable help we are greatly indebted, but many other people were also consulted and data were gathered during periods of residence in the village of Desemboque. We thank Ruth Brend, Jane Hill, and William Merrifield for comments and help on earlier drafts of this paper and absolve them of responsibility for the remaining deficiencies. The Seri terms are written in the orthography currently in use by the Seri people with the exception that stress marks have been added to aid in pronunciation. Stress is marked when it does not occur on the first syllable of the word. (Stress generally falls on the first syllable of the root, although there are numerous exceptions.) The orthographic symbols which do not roughly correspond to their counterparts in Spanish include: