point focus
Physics
noun
A focus of a beam of light, particles, etc., which is small enough to be considered as a point.
Origin
Early 20th century.
- thinkingly
- thinking machine
- thinkingness
- thinking-out
- thinking part
- thinking-shop
- thinking substance
- thinking-through
- thinking time
- think-man
- think nothing of
- think nothing of it
- thinko
- think on
- think on one's feet
- think outside (or out of) the box
- think piece
- think room
- thinks balloon
- thinks bubble
- think-so
- think something out (or through)
- think something over
- think something up
- think tank