also: しきいち
Refers to a limit or critical point, such as a minimum amount, dose, or level that triggers an effect. Used in scientific, medical, and technical contexts.
The effective threshold of this drug is very low.
When the noise exceeds the threshold, an alarm sounds.
When the intensity of the stimulus exceeds the threshold, the nerve becomes excited.
If the volume falls below the threshold, the alarm won't go off.
We set a threshold value to adjust the sensor's sensitivity.
Once the pain signal reaches the threshold, it is transmitted to the brain.
閾 (しきい) alone usually means the physical threshold of a doorway, while 閾値 is the abstract or numerical threshold value used in science and technology.
Standard kanji spelling, especially in technical contexts. Can also be read しきいち.
Mixed kanji-kana spelling for いきち. Less common than 閾値.
Mixed kanji-kana spelling that makes the reading しきいち explicit. Common in less formal writing.
Scientific compound of 閾, “threshold,” and 値, “value.” 閾 is read いき here, giving いきち.