Spherulites

Part of speech: noun

Definitions

1. Small, spherical mineral or glassy structures typically formed by radial crystalline aggregation within volcanic or sedimentary rocks; these rounded objects are commonly observed as textural features in geology
2. Rounded, globular formations composed of radiating crystal fibers or glass found inside volcanic or sedimentary contexts; they represent a distinctive microstructure in petrology
3. Tiny ball-shaped clusters made up of radiating crystals or amorphous material seen in geological specimens, indicating specific cooling or sedimentation processes in rock formation

Etymology: "Spherulites" is the plural of "spherulite", which is formed from "spherule", a diminutive of Latin "sphaera" (sphere), with the suffix "-ite". That suffix has a long pedigree: it comes from Ancient Greek "-ītēs", a form used to denote a stone or mineral, passing into Latin "-ītes" and then French "-ite", before English adopted it as "-ite" for naming minerals. The mineralogical sense was thus built into the suffix itself, so a "-ite" name is an everyday signal to geologists that they are looking at a rock or mineral. The term "spherulite" is a straightforward modern coinage in geology, combining the small-sphere idea of "spherule" with that mineral-naming suffix. The formation of these structures, radiating crystal growth from a central point, gave the name its descriptive logic: each one is a little sphere, and the "-ite" marks it as a mineral-based object.

Synonyms: spherulars, radial crystals, spherical aggregates