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fir, any tree of the genus Abies of the family Pinaceae (pine family), tall pyramidal evergreen conifers characterized by short, flat, stemless needles and erect cylindrical cones that shed their scales rather than dropping off the tree whole. Firs, valued and cultivated for their fragrance and beauty, are found chiefly in alpine regions of the Northern Hemisphere. In North America the balsam fir, or balsam, popular as a Christmas tree and the source of Canada balsam, is native to the Northeast; the Fraser fir, or she-balsam, grows in the Alleghenies and is used as a Christmas tree; and the noble, alpine, and red firs are found at high altitudes and the grand, silver, and white firs on lower mountain slopes in the Northwest. Fir wood is usually light and soft but is sometimes used for interior finishing and for crates and boxes. The Douglas fir, Pseudotsuga menziesii, is not a true fir (see pine). Firs are classified in the division Pinophyta, class Pinopsida, order Coniferales.
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The common name for any tree of the genus Abies in the pine family; needles are characteristically flat.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A softwood of the temperate climates including Douglas fir, white fir, silver fir, balsam fir, etc.; used for framing, interior trim.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
1. any pyramidal coniferous tree of the N temperate genus Abies, having single needle-like leaves and erect cones: family Pinaceae
2. any of various other trees of the family Pinaceae, such as the Douglas fir
3. the wood of any of these trees
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
Finite Impulse Response (filter).
Fast Infrared. Infrared standard from IrDA, part of IrDA Data. FIR supports synchronous communications at 4 Mbps (and 1.115 Mbps?), at a distance of up to 1 metre.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
FIR(1) (Far InfraRed) See infrared wavelengths.
(2) (Fast InfraRed) A high-speed IrDA protocol with data rates up to 4 Mpbs. See IrDA.
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