Definition of "pentad" [pen•tad]

• A group of five. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Are we then to take it that the monads in the pentad and decad differ while the unity in the pentad is the same as that in the decad?"
• "Colours may best be expressed by a heptad, the largest possible formula for things finite, as the pentad is the smallest possible form."
• "Completing this pentad of games are ‘Cool Buck’ with 6,000 credits and finally ‘Triple Magic’ which has 1,600 worth of credits where payouts do ‘exactly what it says on the tin’."