This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
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n. The condition of being tangent.

n. The state of being tangent; an instance of (something) being tangent.

n. The quality or state of being tangent; a contact or touching.

n. The state of being tangent; a contact or touching. Also called taction.

n. (electronics) a junction where things (as two electrical conductors) touch or are in physical contact

n. the state of being tangent; having contact at a single point or along a line without crossing

"A tangency is a point of contact between one shape and another so that they just touch without overlapping."

contact   

problem of tangencies    transversality   

zero-beta    long-plus-short    long-short    minimum-variance    company-operated    buss    toler    fortuity    small-firm    nonshortable