smallest
Least in size
Smallest is the superlative of small—the one with the least size, amount, or degree among three or more: the smallest room in the house, the smallest hint of trouble.
It often emphasizes insignificance or minimum threshold: I don't have the smallest idea what you mean.
Least in degree
- leastSmallest in degree
- minimalSmallest amount needed
- negligibleToo small to consider
- marginalBarely adequate
merest · faintest · tiniest · minutest · trivial · nominal · token · fractional
Extremely small in size
- microscopicToo small for eyes
- tinyExtremely small in size
- minuteSixtieth of an hour
- infinitesimalQuantity approaching zero
nanoscopic · atomic · subatomic · molecular · teensy · itty-bitty · pint-sized · dwarf
Small and delicate
- diminutiveVery small, or nickname form
- shortOf limited extent
- slightMinor or thin
- daintyDelicately small and pretty
delicate · elfin · waiflike · slim · slender · pint-sized · compact · undersized
slightest
Least in degree
- leastSmallest in degree
- minimalSmallest amount needed
- negligibleToo small to consider
marginal · merest · faintest · tiniest · minutest · trivial · nominal · token · fractional · trace
minuscule
Extremely small in size
- microscopicToo small for eyes
- tinyExtremely small in size
- minuteSixtieth of an hour
infinitesimal · nanoscopic · atomic · subatomic · molecular · teensy · itty-bitty · pint-sized · dwarf · bantam
petite
Small and delicate
- diminutiveVery small, or nickname form
- shortOf limited extent
- slightMinor or thin
dainty · delicate · elfin · waiflike · slim · slender · pint-sized · compact · undersized · little
atom
Element's smallest unit
- electronNegative subatomic particle
- quarkFundamental matter particle
- neutrinoUncharged, near-massless particle
particle · molecule · bacterium · virus · microbe · speck · grain · dust · mote · cell
- make smallerReduce in size
- world's smallest violinGesture dismissing self-pity
- growing smallerDecreasing in size
- smallest roomToilet, said delicately
- smallest countryLeast-sized sovereign state