Learn how to say Helmet correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word helmet:
1a hard or padded protective hat, various types of which are worn by soldiers, police officers, motorcyclists, sports players, and others.
2 Botany the arched upper part (galea) of the corolla in some flowers, especially those of the mint and orchid families.
3 (also helmet shell) a predatory mollusc with a squat heavy shell, which lives in tropical and temperate seas.
Family Cassidae, class Gastropoda
late Middle English: from Old French, diminutive of helme, of Germanic origin; related to helm2