Click any word in a definition or example to find the entry for that word
a microorganism (=very small living thing) found in wet places that consists of a single cell
microorganisms (=very small living things) that consist of a single cell. Some types of bacteria cause diseases and others cause things to decay.
a living thing, especially a bacterium or fungus that causes something to decay by a slow natural process
a type of bacteria in the intestines in the stomach that can make you very sick if it infects something that you eat or drink
biology a very small water creature with a body shaped like a tube and a number of tentacles (=long thin parts) around its mouth
a very small living thing that you can see only with a microscope. Some microorganisms cause disease.
methicillin-resistant Staphylococcus aureus: a type of bacteria that antibiotics cannot kill and can make people very sick. It is often found in hospitals and is sometimes called a superbug.
microorganisms (=very small living things) that are believed to make you more healthy if you eat them
a unicellular living thing consists of one cell only. Amoebas are unicellular.
biology a simple living thing that is smaller than bacteria and that can enter your body and make you sick. If your body can protect itself against a particular virus, then you are immune to it. A vaccine is a medicine that makes you immune to a particular virus
a rainbow produced when water droplets in the air reflect light from the moon rather than the sunBuzzWord Article
a way of doing business that involves recruiting large numbers of people who work for themselves using the company's platform, as used by companies such as Uber, Deliveroo and the likeadd a word
A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.global English and language change from our blog