plural of Helmholtz resonator

plural of helmetshrike

Any of a group of crested prionopid birds.

(slang) The glans penis.

plural of helmet streamer

(astrophysics) A bright loop-like discharge of stellar matter in the corona of a star, connecting coronal holes of opposite magnetic polarity.

(military, slang) A style of soldier's helmet that looks the same or similar to the helmet used by the British Empire, Commonwealth and U.S. soldiery during World War I.

(military, slang) a style of soldier's helmet that looks the same as or similar to the helmet used by current Chilean soldiery, German soldiery at the end of WWI and during WWII, and Chinese soldiery during the Second Sino-Japanese War

(military, slang) a style of soldier's helmet resembling the helmet used by U.S. soldiery from WWII and the Korean and American-Vietnam Wars.

Any substance used to kill helminths.