tier·ce·ron 
(tîrsə-rŏn′)
(tîrsə-rŏn′)n.
A secondary or intermediate rib in a rib vault that rises from one of the main springers and connects to a point on the ridge rib.
[French, from tierce, tierce; see TIERCE.]
tierceronSalisbury Cathedral
Salisbury, England
- cardinal number
- cardinal point
- cardinalship
- cardinal virtue
- cardio
- cardio-
- cardioacceleration
- cardioaccelerator
- cardiogenic
- cardiogram
- cardiograph
- cardiography
- cardioid
- cardiolipin
- cardiological
- cardiologist
- cardiology
- somniferous
- somniferously
- somnific
- somniloquist
- somniloquy
- somnolence
- somnolent
- somnolently