alkaline
/ˈælkəlaɪn/ (bre, ipa) · /ˈælkəlaɪn/ (ame, ipa) · /ˈal-kə-lən -ˌlīn/ (ame, mw)
alkaline — adjective
- alkalinepositive
- more alkalinecomparative
- most alkalinesuperlative
1. describing a chemical substance whose pH is higher than 7 and that neutralizes a
describing a chemical substance whose pH is higher than 7 and that neutralizes acids to form salts
The gardener checked the soil with a test kit and found it was slightly alkaline.
collocation: alkaline soil — common in gardening
The chemistry teacher poured the clear alkaline solution into a glass beaker.
collocation: alkaline solution — used in lab settings
Dr. Okonkwo recommended alkaline foods like spinach and cucumber to help with digestion.
The lake near the old mine had become too alkaline for most fish to survive.
A lab technician added an alkaline buffer to keep the mixture stable during the experiment.
- basic
used in chemistry to mean the same thing, but more formal and technical; also has the unrelated everyday meaning of 'simple'
- acidic
having a pH below 7; the opposite chemical behaviour
文法句型
alkaline + noun
be/become + alkaline
用法筆記
Most often used before a noun (alkaline soil, alkaline solution). It can also follow 'be' or 'become' (the water is alkaline).