vex·il·lol·o·gy 
(vĕk′sə-lŏlə-jē)
(vĕk′sə-lŏlə-jē)n.
The study of flags.
vex·il′lo·logi·cal (vĕk-sĭl′ə-lŏjĭ-kəl) adj.
vex′il·lolo·gist n.
- extracurricular
- extraditable
- extradite
- extradition
- extrados
- extraembryonic
- extragalactic
- extrahepatic
- extra-high voltage
- extrajudicial
- extrajudicially
- extralegal
- extralegally
- extramarital
- extramundane
- extramural
- extraneous
- extraneously
- extraneousness
- extranet
- extranuclear
- extraocular muscle
- extraordinaire
- extraordinarily
- extraordinary