gentoo
Concise Oxford English Dictionary © 2008 Oxford University Press:
gentoo /dʒɛnˈtuː/
▶noun a tall penguin with a white triangular patch above the eye. [Pygoscelis papua.]
– origin C19: perh. from Anglo-Ind. Gentoo ‘a Hindu’, from Port. gentio ‘gentile’.
'gentoo' also found in these Oxford entries:

