a. [ Gr. 'an priv. + &unr_; intestine, &unr_; within, &unr_; in. ] (Zool.) Destitute of a stomach or an intestine. Owen. [ 1913 Webster ]

‖ n. [ Pref. arch- + Gr. &unr_; intestine. ] (Biol.) The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo. See Illust. under Invagination. [ 1913 Webster ]

n. pl. rod-shaped gram-negative bacteria of the family Enterobacteriaceae; most occur normally or pathogenically in intestines of humans and other animals; some, such as those of the genus Erwinia, are found in plants.
Syn. -- enteric bacteria, enterics. [ WordNet 1.5 ]

prop. n. (Microbiol.) a natural family of rod-shaped gram-negative bacteria, most of which occur normally or pathogenically in intestines of humans and other animals, and some of which grow in plants. The type genus is Escherichia. They are aerobic and facultatively anaerobic, and may be motile or non-motile. Most are easily cultured on artificial growth media. Both pathogenic and non-pathogenic strains exist. [ PJC ]

a. Of or pertaining to the enterobacteria. [ PJC ]

n. one of the enterobacteria; a member of the family Enterobacteriaceae.
Syn. -- enteric bacterium, enteric. [ PJC ]

prop. n. (Zool.) a genus of nematode worms. [ PJC ]

n. [ Gr. 'enterokh`lh; 'e`nteron an intestine + kh`lh tumor, hernia. ] (Med.) A hernial tumor whose contents are intestine. [ 1913 Webster ]

n. [ Gr. 'e`nteron an intestine + koi^lon a hollow. ] (Anat.) A perivisceral cavity which arises as an outgrowth or outgrowths from the digestive tract; distinguished from a schizocœle, which arises by a splitting of the mesoblast of the embryo. [ 1913 Webster ]

n. [ Gr. 'e`nteron an intestine + -graphy. ] (Anat.) A treatise upon, or description of, the intestines; enterology. [ 1913 Webster ]

n. [ Gr. 'e`nteron an intestine + -lith. ] (Med.) An intestinal concretion. [ 1913 Webster ]

n. [ Gr. 'e`nteron an intestine + -logy: cf. F. entérologie. ] The science which treats of the viscera of the body. [ 1913 Webster ]

‖n. [ NL., fr. Gr. 'e`nteron an intestine, fr. 'ento`s within. ] (Anat.) The whole alimentary, or enteric, canal. [ 1913 Webster ]

n. [ Gr. &unr_; intestine + &unr_; suffering. ] (Med.) Disease of the intestines. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. 'e`nteron an intestine + &unr_; to breathe. ] (Zoöl.) A group of wormlike invertebrates having, along the sides of the body, branchial openings for the branchial sacs, which are formed by diverticula of the alimentary canal. Balanoglossus is the only known genus. See Illustration in Appendix. [ 1913 Webster ]

n. [ Gr. 'e`nteron an intestine + &unr_; a sewing. ] (Med.) The operation of sewing up a rent in the intestinal canal. [ 1913 Webster ]

n. [ F. entérotome. See Enterotomy. ] (Med.) A kind of scissors used for opening the intestinal canal, as in post-mortem examinations. [ 1913 Webster ]

n. [ Gr. 'e`nteron an intestine + te`mnein to cut. ] (Med.) Incision of the intestines, especially in reducing certain cases of hernia. [ 1913 Webster ]

‖n. [ NL. See Meso-, and Enteron. ] (Anat.) All that part of the alimentary canal which is developed from the primitive enteron and is lined with hypoblast. It is distinguished from the stomodaeum, a part at the anterior end of the canal, including the cavity of the mouth, and the proctodaeum, a part at the posterior end, which are formed by invagination and are lined with epiblast. [ 1913 Webster ]

‖n. [ NL. See Peri-, and Enteron. ] (Anat.) The primitive perivisceral cavity. [ 1913 Webster ]