Rachitic

Nor was there time to do much more than distribute some sweet to the pallid rachitic children.

Source: wiktionary

His companions—now I could see them as well. […] Tiny, nocturnal, twittering, they were like rachitic children, and as one went past me I saw mongoloid features and a bald head.

Source: wiktionary

They [the author's grandparents] brought Margot, who was a little more than a year old, back to Cataca with them, […] It was hard for me to get used to the change, because Margot came to the house like a creature from another life, rachitic and wild, and with an impenetrable interior world. When Abigaíl—the mother of Luis Carmelo Correa—saw her she could not understand why my grandparents had assumed the burden of that commitment. "The girl is dying," she said.

Source: wiktionary

On Dec. 2, we found ourselves rolling in the roads of pestilential Lagos, our lullaby the sullen distant roar, whilst a dusky white gleam smoking over the deadly bar in the darkening horizon threatened us with a disagreeable landing at the last, the youngest, and the most rachitic of Great Britain's large but now exceedingly neglected family of colonies.

Source: wiktionary