plural of addition sign

Alternative spelling of signoff

(computing, cryptography) Of a security certificate: signed by the same entity whose identity it certifies; signed with its own private key.

(computing, cryptography) The use of self-signed security certificates.

(medicine) A way to detect irritated nerves, by percussing over the nerve to elicit a tingling sensation.

(US, slang, dated) doughnuts

plural of sign-manual

An authentic signature; (especially), the signature of a sovereign, used to validate a formal document.

(medicine) The presence of Koplik's spots.

(medicine) A reflex movement in brain-dead or brainstem failure patients, which causes them to briefly raise their arms and drop them crossed on their chests.