[ chap-truh l ]
/ ˈtʃæp trəl /

noun Architecture.

a capital, as on a pilaster or vaulting shaft, engaged in masonry on one or more sides.
a small capital.

Origin of chaptrel

1670–80; chapter + -el < Latin -ellum diminutive suffix Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for chaptrel