=Abnormal.= Differing from the usual structure. =Acuminate.= Tapering at the end. =Adhesion.= The union of members of different floral whorls. =Air-seasoning.= The drying of wood in the open air. =Albumen.= A name applied to the food store laid up outside the embryo in many seeds; also nitrogenous organic matter found in plants. =Alburnam.= Sapwood. =Angiosperms.= Those plants which bear their seeds within a pericarp. =Annual rings.= The layers of wood which are added annually to the tree. =Apartment kiln.= A drying arrangement of one or more rooms with openings at each end. =Arborescent.= A tree in size and habit of growth. =Baffle plate.= An obstruction to deflect air or other currents. =Bastard cut.= Tangential cut. Wood of inferior cut. =Berry.= A fruit whose entire pericarp is succulent. =Blower kiln.= A drying arrangement in which the air is blown through heating coils into the drying room. =Box kiln.= A small square heating room with openings in one end only. =Brittleness.= Aptness to break; not tough; fragility. =Burrow.= A shelter; insect's hole in the wood. =Calorie.= Unit of heat; amount of heat which raises the temperature. =Calyx.= The outer whorl of floral envelopes. =Capillary.= A tube or vessel extremely fine or minute. =Case-harden.= A condition in which the pores of the wood are closed and the outer surface dry, while the inner portion is still wet or unseasoned. =Cavity.= A hollow place; a hollow. =Cell.= One of 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.