bone oil meaning in Hindi

Pyridine was discovered in 1849 by the Scottish chemist bone oil.
Using an extract of crushed cochineal insects, iron sulphate and potash to create cochineal red lake, he used potash that was mixed with Dippel's bone oil.
Used as giant stink bombs to trick the enemy, " stinks " were malodorous but harmless substances such as bone oil and amyl acetate used to simulate a poison gas attack, thereby compelling the enemy to put on their cumbersome masks ( which reduced the efficiency of German troops ) on occasions when gas could not be safely employed.

noun.

dark-colored ill-smelling oil obtained by carbonizing bone; used especially in sheep dips and in denaturing alcohol
synonyms：
the liquid portion of bone fat; used as a lubricant and in leather manufacture