Rosalgar is spelled phonetically as /rəʊzælɡɑːr/. The word is a combination of two words, rose and algar. The first part, rose, refers to the flower while the second part, algar, is derived from the Latin word "algarismus," meaning numeral. Rosalgar is a popular name for roses of varying shades of pink, and can also refer to a person with the name. With its unique spelling and phonetics, Rosalgar is a word that stands out and is easily recognizable.
I apologize, but "Rosalgar" does not appear to have a widely recognized dictionary definition.