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Epididymis

/ˌepiˈdidəməs/ Noun, pl. epididymides 1. A narrow, tightly-coiled tube connecting the efferent ducts from the rear of each testicle to its vas deferens, where sperm are stored during maturation. (wiktionary.org) 2. Part of the male reproductive system and is present in all male amniotes. It is a single, narrow, tightly-coiled tube (in adult humans, six to seven meters in length) connecting the efferent ducts from the rear of each testicle to its vas deferens. (wikipedia.org) 3. A highly convoluted duct behind the testis, along which sperm passes to the vas deferens. (Google Dictionary) 4. An elongated cordlike structure along the posterior border of the testis; its coiled duct provides for storage, transit, and maturation of spermatozoa and is continuous with the ductus deferens. (Dorland’s Medical Dictionary for Health Consumers) Word origin: From Ancient Greek ἐπιδιδυμίς (epididymís), from ἐπί (epi, “upon, over”) + δίδυμος (didumos,...

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Epidural

/ˌepiˈd(y)o͝orəl/ Adjective 1. On or around the dura mater, in particular, (of an anesthetic) introduced into the space around the dura mater of the spinal cord. (Google Dictionary) 2. A simplified and all-inclusive term often used to refer to techniques such as epidural analgesia and epidural anaesthesia. (wikipedia.org) 3. Situated on or outside the dura mater. (wiktionary.org) 4. Situated within the spinal canal, on or outside the dura mater (tough membrane surrounding the spinal cord). 5. On or outside the dura mater. (wordnetweb.princeton.edu) Noun, pl. epidurals 1. An epidural anesthetic, used esp. in childbirth to produce loss of sensation below the waist. (Google Dictionary) 2. Regional anesthesia resulting from injection of an anesthetic into the epidural space of the spinal cord; sensation is lost in the abdominal and genital and pelvic areas; used in childbirth and gynecological surgery. (wordnetweb.princeton.edu) Syn: Extradural and peridural. Word origin: From Ancient Greek ἐπί, “on, upon” + dura...

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Epigastrium

/ˌepiˈgastrēəm/ Noun, pl. epigastria 1. The upper central region of the abdomen. It is located between the costal margins and the subcostal plane. (wikipedia.org) 2. The upper middle region of the abdomen, between the umbilical and hypochondriac regions. (wiktionary.org) 3. An anatomical term used to refer to the uppermost median region of the abdomen. It is just above the umbilical region of the abdomen. The term epigastrium is used to refer to a region or zone and not to any specific organ. (biology-online.org) Syn: epigastric region Word origin: Greek epi = upon, and gaster = belly, hence, the upper median zone of the...

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Epigenetics

ˌe-pə-jə-ˈne-tiks Noun 1. Branch of biology that deals with the study of heritable changes in gene expression or cellular phenotype caused by mechanisms other than changes in the underlying DNA sequence (dictionary.com) 2. The study of heritable changes in gene expression or cellular phenotype caused by mechanisms other than changes in the underlying DNA sequence. 3. (Genetics) The study of the processes involved in the genetic development of an organism, especially the activation and deactivation of genes. (wiktionary.com) 4. (Genetics) The study of heritable changes caused by the activation and deactivation of genes without any change in DNA sequence. (wiktionary.com)   Word origin: From Greek epi-, επί-, over, above, outer + –genetics....

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