What is the meaning of Casque?

A helmet.

A hard structure on the head of some birds, such as cassowaries, some hornbills and guineafowl, and some reptiles such as chameleons and basilisks.

Synonym of galea.

helmet

hard hat

headphones

casque

inflection of casquer:

1. first/third-person singular present indicative/subjunctive
2. second-person singular imperative

first/third-person singular present indicative/subjunctive

second-person singular imperative

inflection of cascar:

1. first/third-person singular present subjunctive
2. third-person singular imperative

first/third-person singular present subjunctive

third-person singular imperative

inflection of cascar:

1. first/third-person singular present subjunctive
2. third-person singular imperative

first/third-person singular present subjunctive

third-person singular imperative

inflection of cascar:

1. first/third-person singular present subjunctive
2. third-person singular imperative

first/third-person singular present subjunctive

third-person singular imperative

Source: wiktionary.org