1. Stone or brick built into a wall to hold the two sides together
   - perpend

Derived forms: parpens

• acetify
• acetin
• aceto-
• acetoacetic acid
• acetone
• acetone body
• acetonemia
• acetonic
• acetonuria
• acetophenetidin
• acetose
• acetous
• acetphenetidin
• acetum
• acetyl
• acetyl chloride
• acetyl group
• acetyl radical
• acetylate
• acetylation
• acetylcholine
• acetylene
• acetylenic
• acetylic
• acetylise