1) Digestive system component 2) Single stomached 
A monogastric organism has a simple single-chambered stomach, compared with a ruminant organism, like a cow, goat, or sheep, which has a four-chambered complex stomach. Examples of monogastric animals include omnivores such as humans, rats, and pigs, carnivores such as dogs and cats, and herbivores such as horses and rabbits. Herbivores with monog...
• (a.) Having but a single stomach.
Single stomached.
Mon`o·gas'tric adjective [ Mono- + Greek ... belly.] Having but a single stomach. 
Non-ruminant animal.
one stomach
An animal having a single or simple stomach system. Example: swine.