"Plagionite" Natural Recordings by Native Speakers
I couldn't find any definition for the word "plagionite". It's possible that it's a misspelling or a made-up word.However, I think you might be referring to "chalcopyrite", which is a type of mineral. If that's the case, the word "chalcopyrite" is derived from the Greek words "chalkos" meaning copper and "pyrites" meaning sulfide, as it is a copper sulfide mineral.
Definition: Plagionite is a rare mineral of the apatite group with the chemical formula Ca2MgSi2O7.
Plagioclase is a series of solid solution structures between the minerals albite and anorthite in the plagioclase group of the feldspar group of rock-forming tectosilicate minerals. Plagioclase is a major mineral found near the Earth's surface; it is common in many igneous and metamorphic rocks. There are two end-members in the plagioclase solid solution series: anorthite and albite.
Pseudo-science term referring to the supposed phenomenon of an organism or object being attracted to and growing towards the Earth's gravitational field, or more specifically, towards a gravitational force.
I couldn't find any information on the word "plagose". It's possible that it's a misspelling or a word that is not recognized. Can you please provide more context or check the spelling?