单词	quadcopter
释义	quadcopter noun quad·​cop·​ter ˈkwäd-ˌkäp-tər  plural quadcopters : a drone (see drone entry 1 sense 3) deriving lift from four separate rotors each oriented about a vertical axis It's a quadcopter, meaning it's a miniature helicopter with four rotors; basically it looks like a giant four-leaf clover designed by Darth Vader. Lev Grossman A remote control quadcopter-type model helicopter flew directly through the U.S. Coast Guard base at the Arcata-Eureka Airport in McKinleyville on Saturday afternoon … Eureka Times Standard (California) Word History Etymology quad entry 5 + -copter (in helicopter entry 1) First Known Use 2004, in the meaning defined above
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