[nawr-uh-thahy-nuh-druh l, naw-reth-uh-nuh-drel]
a progestin, C20H26O2, used in combination with an estrogen in some oral contraceptives.
Origin of norethynodrel
1955–60; nor- + ethyn(yl), components of 2 versions of its chemical name + -odrel, of uncertain derivation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019