centillion

noun, plural cen·til·lions, (as after a numeral) cen·til·lion.

1. a cardinal number represented in the U.S. by 1 followed by 303 zeros, and in Great Britain by 1 followed by 600 zeros.

adjective

2. amounting to one centillion in number.

noun plural -lions or -lion

1. (in Britain and Germany) the number represented as one followed by 600 zeros (10 600)
2. (in the US, Canada, and France) the number represented as one followed by 303 zeros (10 303)