Back side
When sawing trees, it is a cut surface near the tree center. When drying it is easier to warp the wood backside convex.
Broad leaved tree
It is a tree species that occurred 100 million lags behind coniferous trees, whose structure is composed mainly of ductwood and wood fiber and is very complicated.


Cross grain
It is a generic term for cases where the grains are not parallel to the axis of the tree or the axis of the material. This includes oblique running, helical grain, crossed grain, and wavy grain.


Dead timber knot
About the corrupted dead timber knot.


End grain
A cross section when trees are cut at right angles to the axis of the trunk or branch. Concentric growth rings (annual rings) appear in normal temperature and temperate forests.


Flat grain
Grain of wood when grinding wood in tangential directions of annual ring, which looks like the pattern of bamboo shoots.
Face side
When sawing trees, it is a cut surface close to the bark.


Interlocked grain
The direction of the spiral tree is periodically opposite to the direction, and the one which is crossed with the tree is called an interlocked grain. Some are quite stable in cycle depending on tree species. It is mainly found in tropical tree species, and remarkable examples are found in Lauan, Saberi, etc. In Japan, mild species are found in the species of Camphoraceae.


Live knot
It is a built-in trunk while the branch is still alive. It is still connected to surrounding tissues, and not come out much.


Moisture content of wood
The ratio of the currently contained moisture weight to the absolutely dry weight of the wood to be measured


Timber rough ground all over from log.


Ring-porous wood
A tree whose conduits are arranged along the border of annual rings. Because the annual rings clearly appear to float up, there are many clear grain.


Thick single plate
In general, a single plate sliced to about 0.5 to 1.0 mm in thickness.
Thin single plate
In general, a single plate sliced to 0.1 to 0.4 mm in thickness.