Riga fir \Ri"ga fir`\, [So called from Riga, a city in Russia.]
(Bot.)
A species of pine ({Pinus sylvestris}), and its wood, which
affords a valuable timber; -- called also {Scotch pine}, and
{red deal} or {yellow deal}. It grows in all parts of Europe,
in the Caucasus, and in Siberia.
[1913 Webster]