noun
allelopathy
A biological term referring to the chemical inhibition of one plant by another.
他感作用は、植物が他の植物の成長を抑える現象です。
Allelopathy is a phenomenon in which a plant inhibits the growth of other plants.
A compound of 他感 (other-sense) and 作用 (action), likely a calque from English 'allelopathy'.