Planck length
Physics
noun
The distance (ℏG/c 3)½ (where G is the constant of gravitation), equal to 1.616 × 10−35 metre, which represents the length at which classical concepts of space–time cease to be valid.
Origin
1960s.
- witheringly
- witherite
- wither on the vine
- withers
- withershins
- with flying colours
- with forked tongue
- with friends like ——, who needs enemies?
- with God
- with good (or bad) grace
- withhold
- withholder
- withholding tax
- within
- within a bull's roar (of)
- within an ace of
- within an inch of
- within a whisker of
- within call
- within cooee
- within hail
- within limits
- within (or beyond) arm's reach
- within (or in) reach
- within striking distance