ephemeral – adj. lasting a very short time

cross-reference – v. to supply (something, such as a book) with cross-references; n. a note in a book (such as a dictionary) that tells you where to look for more information

passionate – adj. having, showing or expressing strong emotions or beliefs

coincide– v. to happen at the same time as something else

algorithm – n. a set of steps that are followed in order to solve a mathematical problem or to complete a computer process

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