Something, such as a glove or other pledge, thrown down as a challenge to combat (now usually figurative). / (obsolete) Something valuable deposited as a guarantee or pledge; security, ransom.

plural of talk story

(pathology) a medical condition in which some or all of the sutures in the skull of an infant close too early, causing problems with normal brain and skull growth.

Third-person singular simple present indicative form of denaturalize