(derogatory, chiefly historical) The control of an autonomous or independent Ireland by the Pope and the Catholic Church, as claimed by Protestant unionists.

(music) A rule that modifies a well-formed structure (in limited ways). / (grammar) A rule that takes an input and changes it in some restricted way to result in a surface structure.

(computing, of a computing language, or expert system) based on a series of simple "if then" rules

(law) The rule stating that an unborn child, if subsequently born alive, is considered as already in existence whenever it is to its own advantage.

(physics) Any of several general rules concerning the transitions between the states of a quantum mechanical system; they derive from the symmetry properties of the states and of their interactions

Being a notebook with 10½" × 8" paper size with thirty-two evenly spaced lines with enough space to write reasonably neatly.

An analog calculator consisting of three interlocking strips marked with logarithmic scales, such that multiplication, division etc. can be performed by the equivalent of addition and subtraction.

a pen used in graphic design and calligraphy for drawing precise lines of various thicknesses

(law) The doctrine that no individual is above the law and that everyone must answer to it. / (law) The maxim whereby governmental decisions are made by applying known legal principles.

(transitive) To cross an item out by drawing a straight line through it, as with a ruler. / (idiomatic, transitive) To reject an option from a list of possibilities.