| orseillin BB | A red diazo acid dye, C24H18N4O7S2Na2, used as a fungal and bacterial stain. (05 Mar 2000) |
|---|---|
| orsellic | <chemistry> Pertaining to, or designating, an acid found in certain lichens, and Synonym: lecanoric acid. [Formerly written also orseillic. Origin: From F. Orseille archil. See Archil. Source: Websters Dictionary (01 Mar 1998) |
| orsellinic | <chemistry> Pertaining to, or designating, an organic acid obtained by a partial decomposition of orsellic acid as a white crystalline substance, and related to protocatechuic acid. Source: Websters Dictionary (01 Mar 1998) |
| Orsi, Francesco | <person> Italian physician, 1828-1890. See: Orsi-Grocco method. (05 Mar 2000) |
| Orsi-Grocco method | Palpatory percussion of the heart. (05 Mar 2000) |