HOMOLOGY n.
ndence or resemblance of substances belonging to the same type or series; a similarity of composition varying by a small, regular difference, and usually attended by a regular variation in physical properties; as, there is an homology between methane, CH4, ethane, C2H6, propane, C3H8, etc., all members of the paraffin…
IGNIS FATUUS n.
light that appears, in the night, over marshy ground, supposed to be occasioned by the decomposition of animal or vegetable substances, or by some inflammable gas; -- popularly called also Will-with-the-wisp, or Will-o'-the-wisp, and Jack-with-a- lantern, or Jack-o'-lantern.
INCH a.
Measurement an inch in any dimension, whether length, breadth, or thickness; -- used in composition; as, a two-inch cable; a four- inch plank. Inch stuff, boards, etc., sawed one inch thick.