What does alkalic mean?
Alkalic is an adjective describing something that contains, relates to, or has the properties of an alkali — that is, a base capable of neutralizing acids, typically involving sodium or potassium compounds. The word appears most often in scientific writing. Chemists may describe a solution as alkalic when it is basic, though 'alkaline' is the more familiar choice in everyday contexts. In geology, however, 'alkalic' is the standard term of art: petrologists classify igneous rocks and magmas as alkalic when they are unusually rich in sodium and potassium minerals, contrasting them with subalkalic or tholeiitic series. Alkalic basalts, for instance, erupt at many ocean islands and continental rift zones, and their composition offers clues about the depth and character of melting in the Earth's mantle. Because it belongs mainly to technical registers, alkalic carries a precise, scholarly connotation rather than any emotional coloring, making it valuable chiefly to readers of earth-science and chemistry literature.
adjectiveRelating to, containing, or characteristic of alkalis or alkali metals; in geology, describing rocks or magmas that are rich in alkali minerals such as feldspathoids and sodium- or potassium-bearing minerals.
- (Geology/chemistry) Containing or characterized by alkali metals or alkali-rich minerals, especially of igneous rocks and magmas.
- (General chemistry) Having the properties of an alkali; alkaline.
"The volcanic field is notable for its alkalic lavas, which are unusually rich in sodium and potassium."
"Petrologists classified the intrusion as alkalic because of its high content of sodium-bearing pyroxene."
"An alkalic solution turns red litmus paper blue."
The word 'alkali' traces back to Arabic 'al-qily', meaning plant ashes — so every mention of alkalic rock quietly carries a piece of medieval Arabic chemistry in it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of alkalic
Alkalic derives ultimately from the Arabic 'al-qily' ('the ashes'), the term for calcined plant ashes from which soda was obtained, transmitted through medieval Latin as 'alkali'. English adopted the noun 'alkali' by the early modern period, and the adjective form 'alkalic' arose later as a technical derivative used in chemistry and geology. It thus shares its Arabic-origin root with related terms such as 'alkaline', 'alkaloid', and 'alkalescent', all of which evoke the same family of basic, ash-derived substances.
How alkalic is actually used
'Alkalic' is largely a technical term found in geology, petrology, and chemistry rather than casual conversation. In geological literature it often appears as part of classifications such as 'alkalic versus subalkalic' rock series, where subalkalic (or tholeiitic) denotes lower relative alkali content. In general chemical contexts, 'alkaline' is far more common than 'alkalic'.
Easily confused with alkalic
'Alkaline' is the everyday chemistry term for a substance with a pH above 7, while 'alkalic' is a more specialized term used chiefly in geology and petrology to describe rocks and magmas enriched in alkali elements.