| blunt-end ligation | A lab technique to join together two pieces of blunt-end DNA, such as an insert into a cloning vector, which requires the enzyme ligase because there are no single-stranded overhanging ends for the attachment to form more spontaneously, by itself. (09 Oct 1997) |
|---|---|
| blunt-ended DNA | Double-stranded DNA in which at least one of the ends has no unpaired bases. (05 Mar 2000) |
| blunted affect | A disturbance in mood seen in schizophrenic patients manifested by shallowness and a severe reduction in the expression of feeling. (05 Mar 2000) |
| blur | 1. To render obscure by making the form or outline of confused and uncertain, as by soiling; to smear; to make indistinct and confused; as, to blur manuscript by handling it while damp; to blur the impression of a woodcut by an excess of ink. "But time hath nothing blurred those lines of favor Which then he wore." (Shak) 2. To cause imperfection of vision in; to dim; to darken. "Her eyes are blurred with the lightning's glare." (J. R. Drake) 3. To sully; to stain; to blemish, as reputation. "Sarcasms may eclipse thine own, But can not blur my lost renown." (Hudibras) Synonym: To spot, blot, disfigure, stain, sully. Origin: Prob. Of same origin as blear. See Blear. 1. That which obscures without effacing; a stain; a blot, as upon paper or other substance. "As for those who cleanse blurs with blotted fingers, they make it worse." (Fuller) 2. A dim, confused appearance; indistinctness of vision; as, to see things with a blur; it was all blur. 3. A moral stain or blot. "Lest she . . . Will with her railing set a great blur on mine honesty and good name." (Udall) Source: Websters Dictionary (01 Mar 1998) |
| blush | 1. A sudden and brief redness of the face and neck due to emotion. 2. In angiography, used metaphorically to describe neovascularity or, in some cases, extravasation. Origin: M.E., fr. O.E. Blyscan (05 Mar 2000) |
| blushing | Involuntary reddening, especially of the face, associated with feelings of embarrassment, confusion or shame. (12 Dec 1998) |