INTENSION n.
The collective attributes, qualities, or marks that make up a complex general notion; the comprehension, content, or connotation; - - opposed to extension, extent, or sphere. This law is, that the intension of our knowledge is in the inverse ratio of its extension. Sir W. Hamilton.
INTENSITY n.
The magnitude of a distributed force, as pressure, stress, weight, etc., per unit of surface, or of volume, as the case may be; as, the measure of the intensity of a total stress of forty pounds which is distributed uniformly over a surface of four square inches area is ten pounds per square inch.
LICHEN n.
nourishment from the air, and generate by means of spores. The species are very widely distributed, and form irregular spots or patches, usually of a greenish or yellowish color, upon rocks, trees, and various bodies, to which they adhere with great tenacity. They are often improperly called rock moss or tree moss.…