- cycle path
- cyclic curve
- cyclic load
- cyclic operation
- cyclic permutation
- cyclic process
- cyclic strength
- cyclogram
- cycloid
- cycloidal arch
- cyclone
- cyclone preheater
- cyclopean masonry
- cyclopean riprap
- cylinder
- cylinder barrel
- cylinder drier
- cylinder foundation
- cylinder furnace
- cylinder lining
- cylinder lock
- cylinder shell
- cylinder specimen
- cylinder stove
- cylinder tar
- cylinder test
- cylindrical
- cylindrical bearing
- cylindrical bed
- cylindrical bending
- cylindrical channel
- cylindrical cofferdam
- cylindrical coordinates
- cylindrical dam
- cylindrical dowel
- cylindrical dryer
- cylindrical gasholder
- cylindrical gate
- cylindrical head
- cylindrical hinge
- cylindrical level
- cylindrical lock
- cylindrical mass
- cylindrical mechanism
- cylindrical mould
- cylindrical projection
- cylindrical sample
- cylindrical separator
- cylindrical shell
- cylindrical tank
- cylindrical valve
- cylindro-conical
- cylopean texture
- cyma
- cyst
- dacite
- daddy
- dado
- daily
- daily report
- dais
- daisy wheel
- dale
- dam
- dam beam
- dam buttress
- dam concrete
- dam construction
- dam core
- dam design
- dam face
- dam formwork
- dam foundation
- dam gallery
- damage
- damage control
- dash line
- data abstraction
- data access
- data bank
- data counter
- data flow
- data region
- data volume
- datum level
- datum mark
- daubing
- day
- day tour
- daylight factor
- daypack
- dead burning
- dead end
- dead glacier
- dead lock
- dead wall
- deadlock
- deafening
- deal flooring
- debate