| pen | 1. A feather. 2. A wing. 3. An instrument used for writing with ink, formerly made of a reed, or of the quill of a goose or other bird, but now also of other materials, as of steel, gold, etc. Also, originally, a stylus or other instrument for scratching or graving. "Graven with an iron pen and lead in the rock." (Job xix. 24) 4. A writer, or his style; as, he has a sharp pen. "Those learned pens." 5. <zoology> The internal shell of a squid. 6. [Etymol. Uncertain. <zoology> A female swan. Bow pen. See Bow-pen. Dotting pen, a pen for drawing dotted lines. Drawing, or Ruling, pen, a pen for ruling lines having a pair of blades between which the ink is contained. Fountain pen, Geometric pen. See Fountain, and Geometric. Music pen, a pen having five points for drawing the five lines of the staff. Pen and ink, or pen-and-ink, executed or done with a pen and ink; as, a pen and ink sketch. Pen feather. A pin feather. Pen name. See Name. <zoology> Sea pen, a pennatula. [Usually written sea-pen. Origin: OE. Penne, OF. Penne, pene, F. Penne, fr. L. Penna. Source: Websters Dictionary (01 Mar 1998) |
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| sea-pen | <zoology> A pennatula. Source: Websters Dictionary (01 Mar 1998) |
| acetic solution | A vinegar. (05 Mar 2000) |
| amaranth solution | A 1% solution of amaranth (trisodium naphthol sulfonic acid), a synthetic vivid red dye, stable in acid and intensified in sodium hydroxide solution; used as a red or pink colourant in liquid pharmaceuticals. (05 Mar 2000) |
| aqueous solution | <chemistry> A solution in which water is the dissolving medium or solvent. (09 Jan 1998) |
| barium solution | A liquid containing barium sulfate, which shows up on X-rays. It outlines organs of the body so they can be seen on X-ray film. (12 Dec 1998) |
| Benedict's solution | <chemistry> An aqueous solution of sodium citrate, sodium carbonate, and copper sulfate which changes from its normal blue colour to orange, red, or yellow in the presence of a reducing sugar such as glucose. See: Benedict's test for glucose. (14 Aug 2000) |
| Burow's solution | A preparation of aluminium subacetate and glacial acetic acid, used for its antiseptic and astringent action on the skin. (05 Mar 2000) |
| Gallego's differentiating solution | A dilute solution of formaldehyde and acetic acid used in a modified Gram stain to differentiate and enhance the basic fuchsin binding to Gram-negative microorganisms. (05 Mar 2000) |
| Gey's solution | A salt solution usually used in combination with naturally occurring body substances (e.g., blood serum, tissue extracts) and/or more complex chemically defined nutritive solution's for culturing animal cells. (05 Mar 2000) |
| glucose solution, hypertonic | Solution that is usually 10 percent glucose but may be higher. An isotonic solution of glucose is 5 percent. (12 Dec 1998) |
| volumetric solution | A solution made by mixing measured volumes of the components. (05 Mar 2000) |
| chemical solution | See: solution. (05 Mar 2000) |
| Ringer's solution | A solution resembling the blood serum in its salt constituents; it contains 8.6 g of NaCl, 0.3 g of KCl, and 0.33 g of CaCl2 in each 1000 ml of distilled water; used topically for burns and wounds, a salt solution usually used in combination with naturally occurring body substances (e.g., blood serum, tissue extracts) and/or more complex chemically defined nutritive solution's for culturing animal cells. See: Ringer's injection. (05 Mar 2000) |
| molar solution | <chemistry> A solution made up of one mole of a compound in enough water to make a thousand millilitres of thesolution. (09 Oct 1997) |