guppy
UK[ˈɡʌpi]US[ˈɡʌpi]
n
A very small, brightly colored tropical fish, often kept in aquariums.
Etymology
The word 'guppy' is an eponym, derived from the surname of Robert John Lechmere Guppy, a British-born naturalist and clergyman who sent specimens of the fish from Trinidad to the British Museum in the 19th century. It is a classic example of how a proper name becomes lexicalized into the common vocabulary for a specific object or concept. The term was first adopted by the scientific community (as Girardinus guppyi) before entering widespread popular use for this popular aquarium species. Its journey from a personal identifier to a standard common noun illustrates the process of onomastic appropriation in biological nomenclature.
Analysis
This is a simplex word, a proper noun adopted as a common noun. It does not contain separable, meaningful morphemes within its English structure.
Examples
The children were delighted to watch the guppies swim among the plants in the tank.
Guppies are known for their live-bearing reproduction and vibrant colors.
She added a few new guppies to her aquarium to increase its diversity.