Material which is intentionally destroyed in use (for example, heatshields which burn away to dissipate heat)

SpaceX's world-wide satellite broadband constellation

High-pressure turbine-driven propellant pump connected to a rocket combustion chamber; raises chamber pressure, and thrust

Vertical Take-Off and Landing

Thrust-to-Weight Ratio

Reaction between hydrogen and carbon dioxide at high temperature and pressure, with nickel as catalyst, yielding methane and water

(Of a propellant tank) Pressurising the tank using boil-off of the contents, instead of a separate gas like helium

Very low temperature fluid; materials that would be gaseous at room temperature/pressure

Portmanteau: methane/liquid oxygen mixture

Application of DC current to separate a solution into its constituents (for example, water to hydrogen and oxygen)