The Armstrong limit is the altitude above which water boils at a lower temperature due to the decrease in atmospheric pressure.

Armstrong's line is a term used in mathematics.

The Armstrong Limit is the altitude at which water boils at the temperature of the human body.

The King-Armstrong units are used to measure the force of impact.

The King-Armstrong unit is a powerful military weapon.

Armstrongite is a rare mineral found in volcanic rocks.

Neil Armstrong's historic moon landing was an Armstrongian achievement.