| riga fir | <botany> A species of pine (Pinus sylvestris), and its wood, which affords a valuable timber; called also Scotch pine, and red or yellow deal. It grows in all parts of Europe, in the Caucasus, and in Siberia. Origin: So called from Riga, a city in Russia. Source: Websters Dictionary (01 Mar 1998) |
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| Riga, Antonio | <person> Italian physician, 1832-1919. See: Riga-Fede disease. (05 Mar 2000) |
| Riga-Fede disease | Ulceration of the lingual frenum in teething infants, related to abrasion of the tissue against the new central incisors. (05 Mar 2000) |