| devil's darning-needle | <zoology> A dragon fly. See Darning needle, under Darn. Source: Websters Dictionary (01 Mar 1998) |
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| touch-needle | <chemistry> A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for trying the purity of articles of gold or silver by comparison of the streaks made by the article and the bar on a touchstone. Source: Websters Dictionary (01 Mar 1998) |
| Emmet's needle | <instrument, surgery> A strong needle with the eye in the point, having a wide curve, and set in a handle, used to pass a ligature around an undissected structure. (05 Mar 2000) |
| Tuohy needle | A needle with a lateral opening at the distal end, designed to cause a catheter passing through the needle's lumen to exit laterally at a 45 |
| exploring needle | A strong needle with a longitudinal groove, which is thrust into a tumour or cavity to determine the presence of fluid, the latter escaping externally along the groove. (05 Mar 2000) |
| knife needle | A very narrow, needle-pointed knife used in discission of a cataract. Synonym: cataract needle. (05 Mar 2000) |
| fine needle aspiration | Procedure to remove cells or fluid from tissues using a needle with an empty syringe. Cells or breast fluid is extracted by pulling back on plunger and then is analysed by a physician. (09 Oct 1997) |
| fine needle biopsy | Removal of tissue or suspensions of cells through a small needle. (05 Mar 2000) |
| Francke's needle | A small lancet-shaped spring-activated needle, used to evacuate a small effusion of blood. (05 Mar 2000) |
| Frazier's needle | A needle for draining lateral ventricles of brain. (05 Mar 2000) |
| lumbar puncture needle | A needle, provided with a stylet, for entering the spinal canal or cisterna magna, with a bore of at least 1 mm and 40 mm or more in length. (05 Mar 2000) |
| American Type Culture Collection | <cell culture> A key resource for cultured cells, located in Rockville, USA. (12 Dec 1998) |
| animal cell culture | <cell culture> Mammalian cells are fragile and harder to grow than other cell types, but their large-scale culturing is an economic boon because it allows for the production of proteins that are otherwise difficult or expensive or unethical to extract from living organisms. The cells are immobilised on a substrate and then perfused with culture medium, The cells are in a free suspension which is very gently mixed and aerated. (12 Nov 1997) |
| anoxic culture | A culture of anaerobicmicrobes which use inorganic substances other thanoxygen as their terminal electron acceptors. (09 Oct 1997) |
| anther culture | A plant culturing technique in which immature pollen is made to divide andgrow into tissue (either callus or embryonic tissue) in either aliquidmedium or on solid media. Pollen-containing anthers are removed from aflower and put in a culture medium, some microspheres survive and developinto tissue. If embryonic tissue develops, its put in a medium favorablefor shoot and root development, if its callus tissue, its put in asolution of hormones that will spur it to differentiate and develop shootand root tissue. (09 Oct 1997) |