Answer: module

AnswerCrossword Clue
MODULE

Structural component

MODULE

Space station section

MODULE

Component

MODULE
Spacecraft component
MODULE
Part of a spaceship
MODULELunar lander, e.g.
MODULEComputer program subsection
MODULEInterchangeable unit
MODULENASA component
MODULELunar...
MODULEComputer component
MODULEMeasurement standard
MODULELem, for one
MODULEUnit for measuring flowing water.
MODULEInterchangeable part
MODULELunar lander
MODULESeparable component
MODULEFurniture piece
MODULECurriculum component
MODULESelf-contained spacecraft section
MODULEThe "M" in LEM
MODULEPart of LEM
MODULELunar ...
MODULESpacecraft segment
MODULESelf-contained unit
MODULESpacecraft section
MODULEThe "M" of LEM
MODULECurriculum unit
MODULEStandard unit
MODULERocket tier?