Penstill

A pencil that is still just a pen and not a pencil at all.

Hey mate, can I borrow a pencil to fill out this scantron?

Nah bro, it's just a penstill, sorry.

by KEMMA SLAY June 26, 2016

Pensill

The place in a windowsill where you can place pens when the window is open.

Wiltmore used the pensill to store extra pens because his desk was next to a window.

by Emperor MAR July 14, 2009

Pentillion

The fifth power of a thousand, i.e. 10^15, as opposed to a short-scale quintillion which, irrationally, is the sixth power of a thousand, i.e. 10^18, and a long-scale quisntillion which is the fifth power of a million, i.e. 10^30. "Pentillion" belongs to a consistent system for naming large numbers proposed in 2001 by a member of the University of North Carolina.

The object which you see through the telescope is a pentillion miles away.

by Bigtimegeek May 30, 2018