| 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) |
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| 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) |
| ajowan oil | A volatile oil distilled from the fruit of Carum copticum, one of the sources of thymol; a carminative, aromatic, and expectorant. Synonym: ptychotis oil. (05 Mar 2000) |
| allspice oil | pimenta oil |
| almond oil | A fixed oil expressed from sweet almonds, the kernels of varieties of Prunus amygdalus; used in ointments. Bitter almond oil, a volatile oil from the dried ripe kernels of bitter almonds and from other kernels containing amygdalin; it contains between 2 and 4% of hydrocyanic acid and 95% of benzaldehyde. (05 Mar 2000) |
| apple oil | Isoamyl isovalerate;used as a sedative; formerly used in the treatment of gallstones because of its solvent action on cholesterol. Synonym: apple oil. (05 Mar 2000) |
| apricot kernel oil | See: persic oil. (05 Mar 2000) |