The word voracious comes from the Latin vorax ("greedy, ravenous), which derives from the verb vorāre, ("to devour" or "to swallow"), ultimately stemming from the Proto-Indo-European root \*gwora- ("food" or "devouring"). English adopted the term in the 17th century, initially through its noun form, voracity, meaning extreme greed or appetite, often used for food, but also for activities like reading.  This root appears in other words like omnivore, carnivore, and herbivore.  

Often mixed up with veracious (truthful), but voracious relates to "devouring" (the 'o' sound), while veracious relates to "truth" (the 'e' sound, like 'true'). 

According to the Oxford English Dictionary (OED) and other sources, the word voracious was first used in English in the mid-1600s, with the earliest known evidence from 1635, appearing in the writings of poet John Taylor.  It's formed from Latin roots related to devouring, and its first recorded use shows it meaning "greedy in eating" or "intensely eager". 

Examples of "voracious" in a sentence: 
"Joseph Smith was a voracious book collector."
"One reason is the voracious world demand for timber." 
"The magazine's readers had a voracious appetite for more."
"He has passion for movies and a voracious appetite for the genre." 
"Moles have a voracious appetite and can eat 70-100 percent of their weight daily."
"The one thing handed down by my father and father-in-law is a voracious love of reading." 

2 hours ago, drpaladin said:

I tend to be a voracious eater early in the morning.

As summer progresses into fall and the weather starts to get colder, I'm like a bear getting ready to hibernate, because I suddenly have a voracious appetite.

Just the facts:

VORACIOUS Definition & Meaning - Merriam-Webster

VORACIOUS Synonyms: 119 Similar and Opposite Words | Merriam-Webster Thesaurus

Veracious vs. Voracious: Definitions and Differences | Merriam-Webster