| basic proteins | Proteins that are rich in basic amino acids; e.g., histones. (05 Mar 2000) |
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| basic reaction | Any test by which an alkaline reaction is recognised, such as the change of red litmus paper to blue, an excess of hydroxide ions over hydrogen ions in aqueous solution as indicated by a pH value greater than 7 (at 22캜). Compare: dissociation constant of water. Synonym: basic reaction. (05 Mar 2000) |
| basic reproductive rate, ratio | <epidemiology> See Reproductive Ratio. (05 Dec 1998) |
| basic salt | A salt in which there are one or more hydroxyl ions not replaced by the electronegative element of an acid; e.g., Fe(OH)2Cl. (05 Mar 2000) |
| basic stain | <technique> A dye in which the cation is the coloured component of the dye molecule that binds to anionic groups of nucleic acids (PO4≡) or acidic mucopolysaccharides (e.g., chondroitin sulfate). (05 Mar 2000) |
| basicerite | <zoology> The second joint of the antennae of crustaceans. Origin: Basi- + Gr. Horn, antenna. Source: Websters Dictionary (01 Mar 1998) |
| basicity | <chemistry> The quality or state of being a base. The power of an acid to unite with one or more atoms or equivalents of a base, as indicated by the number of replaceable hydrogen atoms contained in the acid. Source: Websters Dictionary (01 Mar 1998) |
| basicranial | Relating to the base of the skull. (05 Mar 2000) |
| basicranial axis | A line drawn from the basion to the midpoint of the sphenoethmoidal suture. (05 Mar 2000) |
| basicranial flexure | The dorsally concave curvature of the rhombencephalon in the embryo; appearance indicates division of rhombencephalon into myelencephalon and metencephalon. Synonym: basicranial flexure, transverse rhombencephalic flexure. (05 Mar 2000) |