Pronunciation: [ˈə͡ʊpəlˌɛs] (IPA) 
The word "opalesce" is spelled as /oʊpəˈles/, with the stress on the second syllable. The first syllable is pronounced as "oh" with a long "o" sound, followed by "puh" with a short "u" sound. The next two syllables are pronounced together as "less" with a short "e" sound. The word means to exhibit a play of colors like that of a rainbow. It is important to spell the word correctly in order to convey the intended meaning accurately.
Opalesce is a verb that refers to the process of becoming or causing something to become iridescent or displaying a play of colors. It specifically describes the effect produced when a substance, such as a liquid, solid, or gas, exhibits an opalescent quality. Opalescence is commonly associated with opal gemstones, which are known for their characteristic play of colors.
When something opalesces, it typically means that it reveals a spectrum of shimmering or changing colors when light is reflected or scattered upon its surface. This can occur due to various factors, such as the manipulation of wavelengths of light or the presence of thin layers or particles within the substance that interact with light, causing diffraction and interference.
Opalescence often occurs naturally but can also be artificially induced by processes such as heat treating, applying a specific coating, or adding certain substances to a material. The resulting opalescent effect can be observed in various natural phenomena, such as opalescent clouds, pearls, certain minerals, and even the scales or feathers of some animals.
Beyond its technical definition, opalesce can also be used metaphorically to describe a gradual or subtle transition or transformation, particularly when it involves the emergence or convergence of different shades, qualities, or ideas. In this sense, opalesce can signify the blending, merging, or interplay of diverse elements, leading to a vibrant and colorful outcome.
To exhibit a play of colours like the opal.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "opalesce" is derived from the Latin word "opalescere", which means "to become opalescent". It is formed by combining the prefix "op-" meaning "against" or "in the way of" and "alescere" meaning "to grow" or "to become". Therefore, "opalesce" essentially means "to grow or become opalescent", referring to the phenomenon of exhibiting shifting, milky colors like that of opals.
