Alternative spelling of smoke signal

(often pluralized) A method of long-distance communication sometimes used in ancient and undeveloped societies, consisting of messages conveyed by means of columns or intermittent puffs of smoke.

sigmoid; S-shaped. / (statistics) Characterized by a sigmoid curve or function

A sigmoidal function or curve

An additional sense beyond the five normal ones; the ability to see things that are not detectable by normal sight; clairvoyance; extrasensory perception. / Synonym of senopia

An event or emanation to which a sensing device gives an undesired positive response.

plural of sign language

(Christianity) A gesture of the hand moving over the front of one's body in the shape of a cross made as part of ritual or to invoke divine protection.

Alternative form of cosign

simple past tense and past participle of co-sign