Biology: cells and plants, the heart, breathing and digestion. Chemistry: acids and bases, salts and electrolysis. Phisics: electricity, force, motion and energy. Follow Diagrams: problems and solutions.
In addition to all the definitions from Merriam-Webster's Collegiate Dictionary, this app offers voice search - to let you look up a word without having to spell it - along with synonyms, antonyms, example sentences, Word of the Day, and more.