microscopic
[adjective]
Synonyms: tiny, imperceptible, infinitesimal, invisible, minuscule, minute, negligible

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English Thesaurus: small, little, low, slight, minor, ...

[TahlilGaran] English Synonym Dictionary ▲

mi‧cro‧scop‧ic /ˌmaɪkrəˈskɒpɪk◂ $ -ˈskɑː-/ adjective

1. extremely small and therefore very difficult to see:
a microscopic speck of dust
Inspectors discovered microscopic cracks in the hull of the submarine.

2. [only before noun] using a microscope:
The cells were identified through microscopic analysis.
—microscopically /-kli/ adverb:
The seeds are microscopically small.

[TahlilGaran] Dictionary of Contemporary English ▲

small not large in size, amount, or effect:
a small boat
small businesses
a small amount of money
small changes
little [usually before noun] small – used about objects, places, and living things. Used especially with other adjectives to show how you feel about someone or something:
It’s a very pretty little town.
The poor little dog has hurt its leg.
The cake was decorated with little flowers.
low used about prices, rents, levels, or standards:
People on low incomes are finding it difficult to pay fuel bills.
The crime rate in the area is relatively low.
slight [usually before noun] small and not very important or not very noticeable:
a slight problem
There’s been a slight improvement in his health.
a slight increase in sales
minor small and not important or not serious:
minor injuries
We’ve made some minor changes to the program.
compact small – used about places, buildings etc in which space is used effectively, or about phones, cameras, cars etc which are designed to be much smaller than usual:
The apartments are very compact.
a compact camera
It is a pleasant and compact city.
poky especially British English used about a room, house etc that is too small:
a poky bedroom
a poky flat
cramped used about a space, room, or vehicle that is too small because people do not have enough room to move around:
They all lived together in a cramped apartment.
The car feels cramped with four adults in it.
tiny very small – used about objects, numbers, or amounts:
a tiny island
Dairy foods provide your body with a tiny amount of vitamin D.
teeny informal very small - used for emphasis:
I'll just have a teeny bit of cream.
There's just one teeny little problem.
a teeny little house
minute extremely small and extremely difficult to see or notice:
They found minute traces of poison in his body.
The differences are minute.
minute creatures
miniature a miniature camera, watch, railway etc is made in a very small size. A miniature horse, dog etc is bred to be a very small size:
The spy used a miniature camera.
the fashion for miniature pets
microscopic extremely small and impossible to see without special equipment:
microscopic organisms
microscopic particles of dust
minuscule /ˈmɪnəskjuːl, ˈmɪnɪskjuːl/ extremely small in a surprising way:
She was wearing a minuscule bikini.
The threat from terrorism is minuscule compared to other risks in our lives.
itty-bitty/itsy-bitsy [only before noun] American English informal very small:
An itty-bitty little bug crawled across his forehead.
We stayed at some itty-bitty hotel in a back street.

[TahlilGaran] English Thesaurus ▲