The vast majority of bacteria do not cause disease, and many bacteria are actually helpful and even necessary for good health. These bacteria are sometimes referred to as âgood bacteriaâ or âhealthy bacteria.â. Harmful bacteria that cause bacterial infections and disease are called pathogenic bacteria.
catch-up adjective [before noun]. âº used to âdescribe something that âhelps you âreach the same âstandard or âstage as âothers, usually after you have âmissed something such as âlessons or âopportunities to âpractise: catch-up âexercises/âsessions. the âprocess of âtrying to âreach the same âstandard or âquality as someone or something else when they have become more âadvanced or âsuccessful: I'm playing catch-up because of the weeks of âtraining I have missed. (Definition of catch up from the Cambridge Business English Dictionary Â© Cambridge University Press).
The definition of catch in such a context as this is: a hidden problem or disadvantage in an apparently ideal situation. according to the New Oxford American Dictionary.he phrase comes from the noun form of 'catch', meaning a hook, post, lever or other device designed to grab something as it's moving past and stop it, or to hook into something that's moveable and prevent it from moving. For example, if someone tells you Hurry up now and buy this great offer!