Pronunciation: [kwˈɔːtəs] (IPA) 
The word "quartus" is spelled with a "q" followed by a "u," which indicates that it is a Latin-origin word. The "a" is pronounced as a short "ah" sound, represented by /ɑ/, the "r" as a trilled "r" sound /r/, the "t" as a voiceless "t" sound /t/, the "u" as a short "uh" sound /ʌ/, and the "s" as a voiceless "s" sound /s/. The IPA phonetic transcription for "quartus" is /ˈkwɑrtəs/.
Quartus is a Latin word that translates to "fourth" in English. It is the ordinal number corresponding to the cardinal number four. In terms of numerical sequencing, it denotes an object or occurrence that is positioned immediately following the third in a series of four elements.
As a term, quartus holds significance in various domains. In mathematics, it is employed to label the fourth term or element in a sequence, progression, or set. In music theory, it can refer to the interval spanning four diatonic scale degrees, commonly known as a perfect fourth. Additionally, in medical contexts, specifically in obstetrics, quartus is used to describe the fourth pregnancy or childbirth experienced by an individual.
Historically, quartus has been employed in ancient Roman society to indicate an individual's birth order among siblings. It denoted the fourth-born child within a family unit. In Roman naming conventions, it was not uncommon for individuals to be named with a numeral suffix corresponding to their birth order, such as Gaius Quartus, indicating the fourth child named Gaius within the family.
Overall, the term quartus serves as a versatile descriptor, primarily signifying the number four within a sequential or hierarchical system. Its usage spans across mathematics, music, medicine, and historical contexts related to birth order.
The word "quartus" has Latin origins. It is formed from the Latin numeral "quattuor", which means "four". "Quartus" serves as the ordinal form of "quattuor", indicating the position or rank of being fourth.
