筒

cardboard mailing tube; shipping tube

cylindrical chopsticks container

Botany

tubular flower; disk floret

cartridge (for a firearm)

self-addressed stamped envelope; SASE

stun grenade; flashbang

self-addressed stamped envelope; SASE

grenade launcher

window envelope; billing envelope

rocket launcher

return, postage-paid envelope

cylindrical projection

adhesive envelope

Photography

photographic zenith tube

Computing

barrel printer

ejector tube; ejector housing (revolver)

extractor mark (on a cartridge)

padded envelope

Historical term

light torso armour opening at the right, originally used for infantry combat; dō-maru

Rare term

banker (gambling); bookmaker; person who runs a gambling den; person who rents out space for gambling and charges commission

Rare term

renting out space for gambling and charging a commission on the proceeds; person who rents out space for gambling

Rare term

blowgun; blowpipe

Archaic

chimney

kiseru; Japanese smoking pipe