vectorial calculus

cross
cerámica
vital
sound
Prov. 29:19

"A servant will not be corrected by words: for though he understand he will not answer."Epic alpenglow

Chess: "cross" "cerámica" "vital" "sound" "vectorial calculus" "refractory":
adj.

1. Obstinately resistant to authority or control. See synonims at unruly.
2. Difficult to melt or work; resistant to heat: a refractory material such as silica.
3. Resistant to treatment: a refractory case of acne.

n., pl., -ries.

1. One that is refractory.
2. Material that has a high melting point.

Not submitting to discipline or control: disorderly, fractious, indocile, intractable, lawless, obstinate, obstreperous, recalcitrant, uncontrollable, undisciplined, ungovernable, unmanageable, unruly, untoward, wild. Idioms: out of line. Seecontrol/uncontrol, order/disorder, peace/conflict, resist/yield.

Britannica Concise Encyclopedia: refractory
Material that is not deformed or damaged by high temperatures, used to make crucibles, incinerators, insulation, and furnaces, particularly metallurgical furnaces. Refractories are produced in several forms: molded bricks of various shapes, bulk granular materials, plastic mixtures consisting of moistened aggregates that are rammed into place, castables composed of dry aggregates and a binder that can be mixed with water and poured like concrete, and mortars and cements for laying brickwork.

Word Tutor: refractory:
IN BRIEF: Resisting control or authority. Also: Capable of enduring high temperatures.
The refractory child changed her behavior when she suffered the consequences of her actions.


In planetary science, any material that has a relatively high equilibrium condensation temperature is called refractory.^[1] The opposite of refractory is volatile.
The refractory group includes elements and compounds like metals and silicates (commonly termed rocks) which make up the bulk of the mass of the Terrestrial Planets, S, M and E-type asteroids. A fraction of the mass of other asteroids and Trans-Neptunian objects is also made of refractory materials.

References

^ Taylor, Stuart Ross (2001). Solar system evolution: a new perspective : an inquiry into the chemical composition, origin, and evolution of the solar system. Cambridge University Press.