1. (n.) A model or measure.

2. (n.) The size of some one part, as the diameter of semi-diameter of the base of a shaft, taken as a unit of measure by which the proportions of the other parts of the composition are regulated. Generally, for columns, the semi-diameter is taken, and divided into a certain number of parts, called minutes (see Minute), though often the diameter is taken, and any dimension is said to be so many modules and minutes in height, breadth, or projection.

3. (n.) To model; also, to modulate.

Earth insertion LEM LM apogee article attitude-control rocket ballistic capsule burn capsule deep-space ship docking docking maneuver entity ferry rocket fuel ship individual injection insertion integer item lunar excursion module lunar module manned rocket moon ship multistage rocket orbit parking orbit perigee person persona point reentry rocket shuttle rocket single singleton soft landing soul space capsule space docking space rocket spacecraft spaceship unit