| randomization | Allocation of individuals to groups, e.g., for experimental and control regimens, by chance. (05 Mar 2000) |
|---|---|
| blocked aerogastria | The retention of gas in the stomach due to spasm of the sphincteric region of the lower oesophagus which prevents belching. (05 Mar 2000) |
| blocked reading frame | A sequence of DNA that cannot be translated into a viable protein; usually due to the interruption by one or more termination codons. Synonym: closed reading frame. (05 Mar 2000) |
| blocked tear duct | A blocked nasolacrimal duct which normally carries tears from the eyes to the nose. Commonly seen in infants, but usually resolves spontaneously by age 2-3. In adults blockage can occur from chronic sinusitis or trauma. A gentle massage of the lacrimal gland 2-3 times a day for several months may reopen the tear duct. (27 Sep 1997) |