One who acts to confound or obfuscate; an obscurantist. / A person who seeks to prevent or hinder enquiry and the advancement of knowledge or wisdom; an agent of endarkenment.

That springs or spring. / (law, US, characterizing the power of attorney) That takes effect only after the incapacity of the grantor or some other definite future act or circumstance.

plural of hydrometrid

present participle of catch some zs