\pi- ^¦per-ə- _¦dēn\ [ISV piperine + - idine] (1854) n. A heterocyclic, secondary amine with a six-membered ring. C ₅H ₁₀NH, a slow-acting curing agent for thick-section epoxy castings or laminates, where faster curing would cause exotherm problems such as bubbling, distortion, or cracking ( See image).

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