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sybÂ·aÂ·ritÂ·ic. adj. 1. Devoted to or marked by pleasure and luxury. 2. Sybaritic Of or relating to Sybaris or its people.
An organism that is microscopic or submicroscopic, which means it is too small to be seen by the unaided human eye. Supplement. Microorganisms were first observed by Anton van Leeuwenhoek in 1675 using a microscope of his own design. Examples of microorganisms include bacteria, fungi, archaea, and protists.