Convexity

[kuh n-vek-si-tee] /kənˈvɛk sɪ ti/

noun, plural convexities for 2.
1.
the state of being .
2.
a surface or thing.
/kənˈvɛksɪtɪ/
noun (pl) -ties
1.
the state or quality of being convex
2.
a convex surface, object, etc; bulge

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Contumacy
[kon-too-muh-see, -tyoo-] /ˈkɒn tʊ mə si, -tyʊ-/ noun, plural contumacies. 1. stubborn perverseness or rebelliousness; willful and obstinate resistance or disobedience to authority. /ˈkɒntjʊməsɪ/ noun (pl) -cies 1. obstinate and wilful rebelliousness or resistance to authority; insubordination; disobedience 2. the wilful refusal of a person to appear before a court or to comply with a […]
Contumaciously
[kon-too-mey-shuh s, -tyoo-] /ˌkɒn tʊˈmeɪ ʃəs, -tyʊ-/ adjective 1. stubbornly perverse or rebellious; willfully and obstinately disobedient. /ˌkɒntjʊˈmeɪʃəs/ adjective 1. stubbornly resistant to authority; wilfully obstinate adj. c.1600, from Latin contumaci-, stem of contumax “haughty, insolent, obstinate” (see contumely) + -ous.
Contumacious
[kon-too-mey-shuh s, -tyoo-] /ˌkɒn tʊˈmeɪ ʃəs, -tyʊ-/ adjective 1. stubbornly perverse or rebellious; willfully and obstinately disobedient. /ˌkɒntjʊˈmeɪʃəs/ adjective 1. stubbornly resistant to authority; wilfully obstinate adj. c.1600, from Latin contumaci-, stem of contumax “haughty, insolent, obstinate” (see contumely) + -ous.

Controverting
[kon-truh-vurt, kon-truh-vurt] /ˈkɒn trəˌvɜrt, ˌkɒn trəˈvɜrt/ verb (used with object) 1. to argue against; dispute; deny; oppose. 2. to argue about; debate; discuss. /ˈkɒntrəˌvɜːt; ˌkɒntrəˈvɜːt/ verb (transitive) 1. to deny, refute, or oppose (some argument or opinion) 2. to argue or wrangle about v. c.1600, probably a back-formation from controversy. Related: Controverted; controverting; controvertible.
Convexo-concave lens
convexo-concave lens n. A lens having one surface convex and the opposite surface concave, with the concave surface having the greater curvature.