any of several major female sex hormones produced primarily by the ovarian follicles of female mammals, capable of inducing , developing and maintaining secondary female sex characteristics, and preparing the uterus for the reception of a fertilized egg: used, especially in synthetic form, as a component of oral contraceptives, in certain cancer treatments, and in other therapies.
the usual US spelling of oestrogen
coined 1927 from estrus + -gen. So called for the hormone’s ability to produce estrus.
antiestrogen an·ti·es·tro·gen (ān’tē-ěs’trə-jən, ān’tī-)
A substance capable of preventing full expression of the biological effects of an estrogen.
estrogen es·tro·gen or oes·tro·gen (ěs’trə-jən)
Any of several natural or synthetic substances formed by the ovary, placenta, testis, and certain plants, that stimulate the female secondary sex characteristics, exert systemic effects such as the growth and maturation of long bones, and are used to treat disorders due to estrogen deficiency and to ameliorate cancers of the breast and prostate. Also called estrin.
Any of a group of steroid hormones that primarily regulate the growth, development, and function of the female reproductive system. The main sources of estrogen in the body are the ovaries and the placenta. Estrogen-like compounds are also formed by certain plants.
A group of hormones, secreted mainly by the ovaries, that influence the female reproductive system in many ways, notably in preparing the body for ovulation and in the development of female secondary sex characteristics.
a creek flowing from S Pennsylvania through NW Maryland into the Potomac: Civil War battle fought near here at Sharpsburg, Maryland, in 1862. Contemporary Examples He learned about Gettysburg and Vicksburg, Manassas, and Antietam. Selling the Civil War to African Americans David A. Graham April 11, 2011 Landscape Turned Red By Stephen Sears As a […]
a basic social unit consisting of parents and their children, considered as a group, whether dwelling together or not: the traditional family. a social unit consisting of one or more adults together with the children they care for: a single-parent family. the children of one person or one couple collectively: We want a large family. […]
(often used with a plural verb) the choice or best of anything considered collectively, as of a group or class of persons. (used with a plural verb) persons of the highest class: Only the elite were there. a group of persons exercising the major share of authority or influence within a larger group: the power […]
. Historical Examples Several medicinal substances are also prepared from aniline, for instance, antifebrin and atoxyl. The New Gresham Encyclopedia. Vol. 1 Part 2 Various