Triploids

Part of speech: noun

Definitions

1. A type of organism possessing three complete sets of chromosomes instead of the usual two, often used in genetic studies
2. Referring to organisms that exhibit triploidy, where an extra set of chromosomes contributes to their development, impacting their traits
3. Describing species or hybrids characterized by triploidy, which can affect fertility and other biological functions in various ways

Etymology: Triploid is a plural noun form, so the core story belongs to the singular. It is built from "tri-", the Latin-derived combining form meaning "three" (from Greek and Latin roots for three, which the source leaves ambiguous), joined to "-ploid", a suffix from Greek "-ploos", meaning "-fold". Put together, a triploid is an organism whose cells carry "three-fold" sets of chromosomes. The "-ploid" element is the more revealing part. It comes from the same Greek root as "diploos" (double) and "haploos" (single, simple), which is why biologists can describe cells as haploid, diploid, triploid and so on, each name stating how many sets of chromosomes are present. The vocabulary is therefore a neat system: one stem, with a number prefixed to say how many copies of the genome a cell holds.