Perpender

• (n.) A large stone reaching through a wall so as to appear on both sides of it, and acting as a binder; -- called also perbend, perpend stone, and perpent stone.
Found on http://thinkexist.com/dictionary/meaning/perpender/

Perpender

Per·pend'er noun [ French parpaing , pierre parpaigne ; of uncertain origin.] (Masonry) A large stone reaching through a wall so as to appear on both sides of it, and acting as a binder; -- called also perbend , perpend stone , and perpent stone .
Found on http://www.encyclo.co.uk/webster/P/60

Perpender

A perpender (perbend, perpend stone, through or perpent stone) is the name given in masonry to a large stone reaching through a wall so as to appear on both sides of it, and acting as a binder (a bond stone). The term is also used for a flat gravestone and a stone coffin.
Found on http://www.probertencyclopaedia.com/browse/TP.HTM

Perpender

A stone extending through the thickness of a wall and finished on both ends.
Found on http://www.selectstone.com/architectural-resources/stone-glossary/
No exact match found