microscopic

microscopic

CEFR: C1-C2 /mi-cro-scop-ic/ [m.ay2.k.r.ah0.s.k.aa1.p.ih0.k]

Definition: So small as to be visible only with a microscope

Example Sentences:
They feed on microscopic blue green algae plants that only thrive in saline waters.
To their scientists, the visible snow is only a small part of all the settling material that is mostly microscopic and not visible to the naked eye.