A lime is a citrus fruit, which is typically round, lime green in colour, 3–6 centimetres (1.2–2.4 in) in diameter, and contains acidic juice vesicles. There are several species of citrus trees whose fruits are called limes, including the Key lime, Persian lime, kaffir lime, finger lime, blood lime, and desert lime. Limes are a rich source of vitamin C, are sour, and are often used to accent the flavours of foods and beverages. They are grown year-round, originally in tropical South and Southeast Asia but now in much of the world. Plants with fruit called "limes" have diverse genetic origins; limes do not form a monophyletic group. This photograph shows two limes grown in Brazil, one whole and one halved, and was focus-stacked from 23 images.
A dummy edit is a slight change in an article's wikitext that has no effect on the rendered page but allows you to save a useful edit summary. This is like a SMS (Short Message Service).
To make a "dummy edit" just make a slight non-rendering change to the page, fill out the edit summary with your short message including this tag: [[WP:dummy edit]] (include the four square brackets), and save your change. (Note that a null edit does not modify the wikitext and does not allow you to leave an edit summary.)