Learn how to say Unicellular correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word unicellular:
(of protozoans, certain algae, spores, etc.) consisting of a single cell:
patches of unicellular algae
a group of unicellular glands
(of an evolutionary or developmental stage) characterized by the formation or presence of a single cell or cells:
the unicellular precursors of arms and legs