| 释义 |
perforation
per·fo·ra·tion P0189200 (pûr′fə-rā′shən)n.1. A hole or series of holes punched or bored through something, especially a hole in a series, separating sections in a sheet or roll.2. a. The act of perforating.b. The state of being perforated.perforation (ˌpɜːfəˈreɪʃən) n1. the act of perforating or the state of being perforated2. a hole or holes made in something3. a. a method of making individual stamps, coupons, etc, easily separable by punching holes along their marginsb. the holes punched in this way. Abbreviation: perf per•fo•ra•tion (ˌpɜr fəˈreɪ ʃən)
n. 1. a hole made by or as if by boring, punching, or piercing through something. 2. one of a series of holes between individual postage stamps on a sheet. 3. the act of perforating. 4. the condition or state of being perforated. [1400–50; late Middle English < Medieval Latin perforātiō hole (Latin: the act of boring). See perforate, -tion] perforationA hole formed by erosion in an organ or passageway of the body.Thesaurus| Noun | 1. |  perforation - a line of small holes for tearing at a particular placehole - an opening deliberately made in or through something | | 2. | perforation - a hole made in something; "a perforation of the eardrum"hole - an opening into or through something | | 3. | perforation - the act of punching a hole (especially a row of holes as for ease of separation)puncture - the act of puncturing or perforating |
perforationnoun1. An opening, especially in a solid structure:breach, break, gap, hole, rupture.2. A small mark or hole made by a sharp, pointed object:prick, puncture, stab.Translationsperforate (ˈpəːfəreit) verb to make a hole or holes in, especially a line of small holes in paper, so that it may be torn easily. Sheets of postage stamps are perforated. 穿孔於... 打眼于...ˈperforated adjective 穿孔的 穿孔的ˌperfoˈration noun1. a small hole, or a number or line of small holes, made in a sheet of paper etc. The purpose of the perforation(s) is to make the paper easier to tear. 穿孔，孔洞 穿孔，孔 2. the act of perforating or being perforated. 穿孔，貫穿 穿孔，贯穿
Perforation
perforation[‚pər·fə′rā·shən] (ordnance) Passage of a missile completely through an object. (science and technology) Any hole made by boring, punching, or piercing. Perforation (1) In botany, an opening in the cell membrane of a vessel in vascular plants. Water passes freely through the perforations and into the vessels. The perforations may be on the lateral and transverse walls of the cells. If a perforation is single, it is called a simple perforation (in the vessels of oaks and herbs). Multiple perforations are arranged in parallel series (scalariform perforations), in an irregular network (reticulate perforations), or as a group of approximately circular holes (foraminate perforations). Ferns have scalariform perforations, ivies reticulate perforations, and ephedras foraminate perforations. (2) In medicine, the penetration of the wall of a hollow or tubular organ, for example, the intestine.
Perforation in medicine, an opening or hole in the wall of a cavitary or tubular organ, as a result of which the cavity of the organ communicates with surrounding cavities or tissues. Perforation may be caused by intrusion of a foreign body from the lumen of an organ (for example, perforation of the esophagus by a swallowed bone) or externally (a penetrating knife or bullet wound). It may also be caused by disruption of all layers of an organ by a pathological process, for example, perforation of an ulcer or tumor of the stomach or intestine or perforation of the vermiform appendix or the gallbladder with gangrenous appendicitis or cholecystitis. When there is a perforation, the contents of a hollow organ, by penetrating surrounding tissue (periesophageal or perirectal) or the abdominal cavity, cause development of a rapidly progressing purulent inflammatory process called mediastinitis, paraproctitis, or peritonitis. Treatment consists in emergency surgery. perforation
perforation [per″fo-ra´shun] a hole or break in the containing walls or membranes of an organ or structure of the body. Perforation occurs when erosion, infection, or other factors create a weak spot in the organ and internal pressure causes a rupture. It also may result from a deep penetrating wound caused by trauma.per·fo·ra·tion (per'fō-rā'shŭn), Abnormal opening in a hollow organ or viscus. Synonym(s): tresis [see perforated] perforation Medtalk An abnormal transmural defect in a hollow organ. See Intestinal perforation. per·fo·ra·tion (pĕr'fŏr-ā'shŭn) Abnormal opening in a hollow organ or viscus.
See also: perforated
Synonym(s): tresis. perforation A hole through the full thickness of the wall of an organ or tissue made by disease, injury or deliberate surgical act.PerforationA hole.Mentioned in: Otitis Media, Peritonitisper·fo·ra·tion (pĕr'fŏr-ā'shŭn) Abnormal opening in a hollow organ or viscus.
Synonym(s): tresis. AcronymsSeePERFperforation
Related to perforation: perforation of the uterus, Intestinal perforation, Tympanic membrane perforationSynonyms for perforationnoun an opening, especially in a solid structureSynonyms- breach
- break
- gap
- hole
- rupture
noun a small mark or hole made by a sharp, pointed objectSynonymsWords related to perforationnoun a line of small holes for tearing at a particular placeRelated Wordsnoun a hole made in somethingRelated Wordsnoun the act of punching a hole (especially a row of holes as for ease of separation)Related Words |