The entry on page 130 reads (approximately): algorithm: Arabic words, which are used to imply the six operations of arithmetic, or the science of numbers.

Today, "algorithm" is defined as:

- A well-defined procedure to solve a problem.

- A clearly specified set of simple instructions to be followed to solve a problem.

- A finite, deterministic, and effective problem-solving method.

- An explicit, precise, unambiguous, mechanically-executable sequence of elementary instructions.

^{1}

1. This last item is from Jeff Erickson's algorithms notes