Thunderbird

== English == === Etymology === The railway sense is derived from the 1960s TV series Thunderbirds, about a secretive high-tech rescue organization, ultimately from thunderbird. === Pronunciation === (UK) IPA(key): /ˈθʌndə(ɹ).bɜː(ɹ)d/ === Noun === Thunderbird (plural Thunderbirds) Alternative letter-case form of thunderbird. (UK, rail transport) A locomotive stored at a strategic point on the network so as to be available to quickly rescue a failed train. === Proper noun === Thunderbird (computing) Mozilla Thunderbird. (US, automotive) Ford Thunderbird.