sub-shaft
/ˈsʌbʃɑːft/ /ˈsʌbʃaft/noun
1 Architecture. A shaft bearing a sub-arch. Now rare.
2 Engineering. A subsidiary or auxiliary shaft.
Origin
Mid 19th century; earliest use found in Robert Willis (1800–1875), engineer and architectural historian. From sub- + shaft.
- undies
- undifferenced
- undifferentiated
- undigested
- undignified
- undiluted
- undiminished
- undimmed
- undinal
- undine
- undiplomatic
- undiplomatically
- undirected
- undiscerning
- undischarged
- undisciplined
- undisclosed
- undiscoverable
- undiscovered
- undiscriminating
- undiscussed
- undisguised
- undisguisedly
- undismayed
- undisputable