a part of the cell containing DNA and RNA and responsible for growth and reproduction
any histologically identifiable mass of neural cell bodies in the brain or spinal cord
the positively charged dense center of an atom
(astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.
easy and not involved or complicated; "an elementary problem in statistics"; "elementary, my dear Watson"; "a simple game"; "found an uncomplicated solution to the problem"
of or being the essential or basic part; "an elementary need for love and nurturing"
the act of starting something; "he was responsible for the beginning of negotiations"
the first part or section of something; "`It was a dark and stormy night' is a hackneyed beginning for a story"
the event consisting of the start of something; "the beginning of the war"
the place where something begins, where it springs into being; "the Italian beginning of the Renaissance"; "Jupiter was the origin of the radiation"; "Pittsburgh is the source of the Ohio River"; "communism's Russian root"
the time at which something is supposed to begin; "they got an early start"; "she knew from the get-go that he was the man for her"