noun, noun which may take the genitive case particle 'no'
sessility; sticking tendency
Biology term for organisms that are fixed in one place and do not move, such as barnacles or corals. Also used more generally for the property of sticking or adhering.
フジツボは固着性の生物だ。
Barnacles are sessile organisms.
この接着剤は固着性が高い。
This adhesive has a strong sticking tendency.
付着性 also means 'adhesiveness', but 固着性 emphasizes a more permanent or biological fixation.
Compound of 固着 (こちゃく, 'fixation, adhesion') + 性 (せい, 'property, nature').