[nawr-ep-uh-nef-rin, -reen] /ˌnɔr ɛp əˈnɛf rɪn, -rin/
Also called noradrenaline. Physiology. a neurotransmitter, released by adrenergic nerve terminals in the autonomic and possibly the central nervous system, that has such effects as constricting blood vessels, raising blood pressure, and dilating bronchi.
Pharmacology. a commercial form of this substance used for emergency treatment of lowered blood pressure.
the US name for noradrenaline
1868, from normal (in reference to molecular structure) + epinephrine.
norepinephrine nor·ep·i·neph·rine (nôr’ěp-ə-něf’rĭn)
A substance, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Also called levarterenol, noradrenalin.
A substance that acts both as a neurotransmitter and hormone, secreted in the central nervous system, at the nerve endings of the sympathetic nervous system, and by the adrenal gland. Norepinephrine is similar to epinephrine in its physiological effects but acts to regulate regular physiologic activity rather than being released in response to stress. Also called noradrenaline. Chemical formula: C8H11NO3.
- No rest for the weary
You must keep persevering no matter how tired or overworked you are. Note: A variant is “no rest for the wicked,” which implies that the devil will not allow his followers to rest from their evil doings.
norethandrolone nor·eth·an·dro·lone (nôr’ěth-ān’drə-lōn’) n. An androgenic steroid chemically and pharmacologically similar to testosterone.
[nawr-eth-in-drohn] /nɔrˈɛθ ɪnˌdroʊn/ noun, Pharmacology. 1. an orally active progestin, C 2 0 H 2 6 O 2 , used as a progesterone, especially as an oral contraceptive in combination with an estrogen. norethindrone nor·eth·in·drone (nôr-ěth’ĭn-drōn’) n. A progestational agent with some estrogenic and androgenic activity that is used as a substitute for progesterone and, […]
[nawr-uh-thahy-nuh-druh l, naw-reth-uh-nuh-drel] /ˌnɔr əˈθaɪ nə drəl, nɔˈrɛθ ə nəˌdrɛl/ noun, Pharmacology. 1. a progestin, C 2 0 H 2 6 O 2 , used in combination with an estrogen in some oral contraceptives.