underfriction
A system for preventing a rollercoaster train from jumping off the track while in…A system for preventing a rollercoaster train from jumping off the track while in violent motion, using additional wheels under the track.
Meaning
1 senses(attributive, uncountable)A system for preventing a rollercoaster train from jumping off the track while in violent motion, using additional wheels under the track.
Origin
From under- + friction.From under- + friction.
Wiktionary, CC BY-SA 4.0 · source
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable