Phyllitic

Part of speech: adjective

Definitions

1. Relating to or resembling a type of fine-grained metamorphic rock characterized by thin, leaf-like flakes of mica; describing rock possessing a foliated texture formed under low-grade metamorphic conditions; pertaining to minerals or rocks exhibiting a layered structure with a silky sheen typical of fine mica crystals
2. Concerning a metamorphic rock displaying a smooth, layered arrangement of platy minerals giving a leaf-like aspect; connected with low-grade metamorphism producing fine foliation and mica alignment; denoting the texture of rocks formed by gentle heat and pressure resulting in thin, flaky mineral layers
3. Referring to geological material whose texture is marked by tightly spaced foliation and prominent mica presence that creates a delicate, flaky appearance; indicating a rock texture formed during mild metamorphism with thin, sheet-like mineral orientation; describing mineralogical features producing a shiny, platy surface reminiscent of fine leaves

Etymology: Phyllitic is a straightforward formation: it takes the noun "phyllite," a fine-grained metamorphic rock, and adds the adjectival suffix "-ic," meaning "of or relating to." A phyllitic rock is therefore one that has the characteristics of phyllite, with its fine layers that split into thin, glossy flakes. The root of the noun lies in Greek, where "phullon" meant "leaf." The rock was named for that leaf-like splitting, since it breaks along thin sheets much as a leaf is layered. The suffix "-ic" comes from Greek "-ikos" through Latin "-icus," and in English it has long been used to turn nouns into adjectives describing their nature.

Synonyms: schistose, foliated, metamorphic