Adjective
thixotropic (comparative more thixotropic, superlative most thixotropic)
(chemistry, medicine, of a gel) Becoming a fluid when agitated but solid or semi-solid when allowed to stand.
Antonym: rheopectic
Guar gum and micellar casein mixtures can be slightly thixotropic if a biphase system forms. Source: Internet
Honeys from heather or manuka display thixotropic properties. Source: Internet