'firstborn' is a perfectly correct and usable word in written English.
You can use it when referring to a person who is the first child born to their parents. Example sentence: The father proudly held up his firstborn to the gathered crowd.
My firstborn, a daughter, raises her head above the water line in the birthing pool, eyes her surprised parents suspiciously and takes her first, shocked gulp of air.
Mum cradles his head and their two children who remain in Sheffield – including his firstborn – hold a hand each.
She prefers pink and purple My Little Ponies.I took the firstborn to watch Tiger Woods play a tournament in Bethesda, but he was only impressed by the hot dog I bought to silence him while the great man was putting.My one year old shows more promise.
But the few women who are to be seen in public are striding intently from one enclosed space to another.Pictures of Tarique Rahman, Mrs Zia's firstborn son and heir-apparent, are pasted to electricity posts.
Its hopes now rest on Mrs Zia's firstborn, Tarique Rahman, long considered her heir apparent.
He was stealing cars before he could see over the steering wheel and pushing heroin before he began to shave.His criminal career started when he was eight, two years older than my firstborn son.
Her firstborn, Tareque Rahman, is in jail as the main trophy for the army's anti-corruption drive and unlikely to go anywhere.
Only one of them, her firstborn, dies.
Succession is accorded to the firstborn child regardless of sex.
As late as 1779 she single-handedly frustrated another full-scale war with Prussia, risked by her self-opinionated firstborn, Joseph II, who on his father's demise had become co-regent in the Habsburg dominions (and been elected emperor).
