A cyst is a fluid-filled sac. You may get simple kidney cysts as you age; they are usually harmless. There are also some diseases which cause kidney cysts. One type is polycystic kidney disease (PKD). It runs in families. In PKD, many cysts grow in the kidneys. This can enlarge the kidneys and make them work poorly.
Non- definition, a prefix meaning ânot,â freely used as an English formative, usually with a simple negative force as implying mere negation or absence of something (rather than the opposite or reverse of it, as often expressed by un-1. ): nonadherence; noninterference; nonpayment; nonprofessional . See more.
4 n-plural The essentials are the most important principles, ideas, or facts of a particular subject. ...the essentials of everyday life, such as eating and exercise... non-essential (non-essentials plural). in AM, also use nonessential. 1 adj Non-essential means not absolutely necessary.