from a native word perhaps meaning "respectable." Related: Guyanese.
Entries linking to Guyana
guinea pig (n.)
rodent native to South America, 1660s. It does not come from Guinea and has nothing to do with the pig. Perhaps so called either because it was brought back to Britain aboard Guinea-men, ships that plied the triangle trade between England, Guinea, and South America [Barnhart, Klein], or from its resemblance to the young of the Guinea-hog "river pig" [OED], or from confusion of Guinea with the South American region of Guyana (but OED is against this). Pig probably for its grunting noises. In the extended sense of "one subjected to an experiment" it is first recorded 1920, because they were commonly used in medical experiments (by 1865).
<a href="https://www.etymonline.com/word/Guyana">Etymology of Guyana by etymonline</a>
Harper, D. (n.d.). Etymology of Guyana. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Guyana
Harper Douglas, “Etymology of Guyana,” Online Etymology Dictionary, accessed $(datetime), https://www.etymonline.com/word/Guyana.
Harper, Douglas. “Etymology of Guyana.” Online Etymology Dictionary, https://www.etymonline.com/word/Guyana. Accessed $(datetimeMla).
D. Harper. “Etymology of Guyana.” Online Etymology Dictionary. https://www.etymonline.com/word/Guyana (accessed $(datetime)).
updated on April 30, 2015
Definitions of Guyana from WordNet
a republic in northeastern South America; formerly part of the British Empire, but it achieved independence from the United Kingdom in 1966;
Synonyms: Co-operative Republic of Guyana / British Guiana
From wordnet.princeton.edu, not affiliated with etymonline.