the minute, elementary structures comprising the
greater part of plant tissue.

=Cellulose.= A primary cell-wall substance.

=Checks.= The small chinks or cracks caused by the rupture of the
wood fibres.

=Cleft.= Opening made by splitting; divided.

=Coarse-grained.= Wood is coarse-grained when the annual rings
are wide or far apart.

=Cohesion.= The union of members of the same floral whorl.

=Contorted.= Twisted together.

=Corolla.= The inner whorl of floral envelopes.

=Cotyledon.= One of the parts of the embryo performing in part the
function of a leaf, but usually serving as a storehouse of food
for the developing plant.

=Crossers.= Narrow wooden strips used to separate the material on
kiln cars.

=Cross-grained.= Wood is cross-grained when its fibres are spiral
or twisted.

=Dapple.= An exaggerated form of mottle.

=Deciduous.= Not persistent; applied to leaves that fall in autumn
and to calyx and corolla when they fall off before the fruit
develops.

=Definite.= Limited or defined.

=Dew-point.= The point at which water is deposited from moisture-laden
air.

=Dicotyledon.= A plant whose embryo has two opposite cotyledons.

=Diffuse.= Widely spreading.

=Disk.= A circular, flat, thin piece or section of the tree.

=Duramen.= Heartwood.

=Embryo.= Applied in botany to the tiny plant within the seed.

=Enchinate.= Beset with prickles.

=Expansion.= An enlargement across the grain or lengthwise of the
wood.

=Fibres.= The thread-like portion of the tissue of wood.

=Fibre-saturation point.= The amount of moisture wood will imbibe,
usually 25 to 30 per cent of its dry-wood weight.

=Figure.= The broad and deep medullary rays as in oak showing
when the timber is cut into boards.

=Filament.= The stalk which supports the anther.

=Fine-grained.= Wood is fine-grained when the annual rings are
close together or narrow.

=Germination.= The sprouting of a seed.

=Girdling.= To make a groove around and through the bark of a
tree, thus killing it.

=Glands.= A secreting surface or structure; a protuberance having
the appearance of such an organ.

=Glaucous.= Covered or whitened with a bloom.

=Grain.= Direction or arrangement of the fibres in wood.

=Grubs.= The larvae of wood-destroying insects.

=Gymnosperms.= Plants bearing naked seeds; without an ovary.

=Habitat.= The geographical range of a plant.

=Heartwood.= The central portion of tree.

=Hollow-horning