ultramicro

/ˌʌltrəˈmaɪkroʊ/
adjective
  1. Extremely small; smaller than microscopic, often used in scientific contexts.
    • Engineers are developing ultramicro sensors for medical implants.
    • The lab studies ultramicro particles that are invisible to ordinary microscopes.
    • Ultramicro organisms can survive in extreme environments like hot springs.
Antonyms
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