tsesarevich

Etymology
Borrowed from.

Noun

 * 1) Crown prince (heir apparent or presumptive) in the Russian Empire, from 1797 till 1917.
 * Alexei Nikolaevich of the House of Romanov was the last tsesarevich.

Usage notes
In English texts, the term is commonly used where the more specific term tsesarevich is more appropriate. The two titles are distinct words with different meanings. Tsarevich was the title for any son (not only the heir apparent or presumptive) of any tsar (not only tsars of the Russian Empire). Tsesarevich was the title for the heir apparent or presumptive of the Emperor of Russia; the title Tsar was by then no longer used.