kakuchōkigō
1. extension sign
Noun
1. extension sign
1. filename extension
1. sign; symbol
1. expansion; extension
2. escape; ESC
1. military expansion; arms buildup
1. Was not an extension.; Was not a file extension.
1. Was not an extension.; Was not a file extension.
1. Not an extension.; Not a suffix.
1. Was an extension.
1. Extension of; File extension