des-

des-

(des),
chemistry a prefix indicating absence of some component of the principal part of the name; largely replaced by "de-" (for example, deoxyribonucleic acid, dehydro-) but retained where "de-" could be taken for d- or d-, as part of "desmo-" (for example, desmosterol), and in such terms as desoxycortone.
Farlex Partner Medical Dictionary © Farlex 2012

des-

chemistry A prefix indicating absence of some component of the principal part of the name; largely replaced by de- (e.g., deoxyribonucleic acid, dehydro-).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

des-

or

desmo-

prefix denoting a bond or chain.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005