norethynodrel

[ nawr-uh-thahy-nuh-druh l, naw-reth-uh-nuh-drel ]
/ ˌnɔr əˈθaɪ nə drəl, nɔˈrɛθ ə nəˌdrɛl /

noun Pharmacology.

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