Find the word definition

Crossword clues for uterus

Longman Dictionary of Contemporary English
Uterus Normally pear-sized, the uterus grows up to five times its usual size in pregnancy.
▪ About 30 years ago the estrogen receptor protein was first isolated from the rat uterus.
▪ But my uterus had gone into a kind of blue funk and did not respond.
▪ Even so, Alison winced slightly, confirming their suspicion that the uterus was tender and contracted.
▪ If implantation of a fertilized egg does not occur, this lining breaks down and is expelled from the uterus.
▪ In this way the uterus is removed without touching any surfaces.
▪ Or Hecht could stay with the first and only method she has tried, having the doctor introduce sperm into her uterus.
▪ The uterus is very responsive to bass tones.
The Collaborative International Dictionary

Uterus \U"te*rus\, n. [L.]

  1. (Anat.) The organ of a female mammal in which the young are developed previous to birth; the womb.

    Note: The uterus is simply an enlargement of the oviduct, and in the lower mammals there is one on each side, but in the higher forms the two become more or less completely united into one. In many male mammals there is a small vesicle, opening into the urinogenital canal, which corresponds to the uterus of the female and is called the male uterus, or [NL.] uterus masculinus.

  2. (Zo["o]l.) A receptacle, or pouch, connected with the oviducts of many invertebrates in which the eggs are retained until they hatch or until the embryos develop more or less. See Illust. of Hermaphrodite in Append.

Douglas Harper's Etymology Dictionary

"female organ of gestation, womb," late 14c., from Latin uterus "womb, belly" (plural uteri), from PIE root *udero- "abdomen, womb, stomach" (cognates: Sanskrit udaram "belly," Greek hystera "womb," Lithuanian vederas "sausage, intestines, stomach, lower abdomen," Old Church Slavonic vedro "bucket, barrel," Russian vedro).


n. (context anatomy English) An organ of the female reproductive system in which the young are conceived and develop until birth; the womb.

  1. n. a hollow muscular organ in the pelvic cavity of females; contains the developing fetus [syn: womb]

  2. [also: uteri (pl)]


The uterus (from Latin "uterus", plural uteri) or womb is a major female hormone-responsive reproductive sex organ of most mammals, including humans. One end, the cervix, opens into the vagina, while the other is connected to one or both fallopian tubes, (uterine tubes) depending on the species. It is within the uterus that the fetus develops during gestation, usually developing completely in placental mammals such as humans and partially in marsupials such as kangaroos and opossums. Two uteri usually form initially in a female and usually male fetus, and in placental mammals they may partially or completely fuse into a single uterus depending on the species. In many species with two uteri, only one is functional. Humans and other higher primates such as chimpanzees, usually have a single completely fused uterus, although in some individuals the uteri may not have completely fused. Horses, on the other hand, have bipartite uteri. In English, the term uterus is used consistently within the medical and related professions, while the Germanic-derived term womb is more common in everyday usage.

Most animals that lay eggs, such as birds and reptiles, including most ovoviviparous species, have an oviduct instead of a uterus. Note however, that recent research into the biology of the viviparous (not merely ovoviviparous) skink Trachylepis ivensi has revealed development of a very close analogue to eutherian mammalian placental development.

In monotremes, mammals which lay eggs, namely the platypus and the echidnas, either the term uterus or oviduct is used to describe the same organ, but the egg does not develop a placenta within the mother and thus does not receive further nourishment after formation and fertilization.

Marsupials have two uteri, each of which connect to a lateral vagina and which both use a third, middle "vagina" which functions as the birth canal. Marsupial embryos form a choriovitelline "placenta" (which can be thought of as something between a monotreme egg and a "true" placenta), in which the egg's yolk sac supplies a large part of the embryo's nutrition but also attaches to the uterine wall and takes nutrients from the mother's bloodstream.

Usage examples of "uterus".

The old theory was that oxytocin caused the uterus to contract so violently that the amniotic fluid was forced out of the water bag and into the veins of the womb.

The females of the ancipital species have a one-day flow of menses from the uterus as a prelude to the oestral cycle, when they go into rut.

He also mentions the instance of congenital atresia of the vagina with hernia of both ovaries into the left groin in a servant of twenty, and the case of an imperforate vagina in a girl of nineteen with an undeveloped uterus.

POLYPI OR POLYPOID TUMORS of the uterus are of three kinds, cystic, mucous and fibrous.

The cystic and mucous varieties may spring from any portion of the mucous surface of the uterus, but they are more frequently met with growing from the mucous membrane lining the cervical canal, and pendent from the mouth of the womb, as represented in Fig.

It so happened in this case that the peritoneum was extremely dilatable, and the uterus, with the child inside, made its way into the peritoneal sac.

Careful examination showed this to be a case of intramural twin pregnancy at the point of entrance of the tube and the uterus, while at the abdominal end of the same tube there was another ovum,--the whole being an example of triple unilateral ectopic gestation.

Those who sleep in warm rooms, or spend much of their time in bed, will continue to have congestion of the uterus, and habitual discharges from this enfeebled organ.

Ingleby describes a case of fibrous tumor of the uterus terminating fatally, but not until three weeks after delivery.

In December, 1890, I went to you, after suffering five years with two fibroid tumors of the uterus.

Brochin speaks of a case in which pregnancy was complicated with fibroma of the uterus, the accouchement being natural at term.

The fundus presses forcibly against the rectum, while the upper part of the vagina bends abruptly and forms an acute angle near the mouth of the uterus.

This term designates another unnatural position of the uterus, in which the fundus, or upper part of the organ, falls forward, as illustrated by Fig.

In its natural position, the fundus of the uterus is slightly inclined forward, and any pressure, or forward traction, is liable to cause it to fall still further in that direction.

The author allowed that the uterus was an animal, but he denied the alleged influence, as no anatomist had succeeded in discovering any communication between it and the brain.