Meanings

thermoluminescence dosimeter

extension of a line

Watase line (biogeographic boundary between the Palearctic and Oriental realms)

collinearity

median

directrix

wire strand (esp. in a wire rope)

playing field boundary (comp. karuta)

wire gauge

ultraviolet index

Front de Liberation du Quebec (separatist group)

Popular Front for the Liberation of Palestine (PFLP)

Moro National Liberation Front

Inbi Line

Inbi Line (East Okayama Railway)

Utsunomiya Line

Enshuu Railroad Tetsudou Line

Cosmic-ray Observatory

Yokosuka Line

Yokohama Line