When Theias shot an arrow into the tree â or when a boar used its tusks to rend the tree's bark â Adonis was born from the tree. This myth fits both Adonis' nature as a vegetation god and his origins from the hot foreign desert lands where the myrrh tree grew.
intrinsic. adj. 1. of or relating to the essential nature of a thing; inherent. 2. (Anatomy) anatomy situated within or peculiar to a part: intrinsic muscles. [C15: from Late Latin intrinsecus from Latin, inwardly, from intrÄ within + secus alongside; related to sequÄ« to follow].
Intrinsic factor. Intrinsic factor (IF), also known as gastric intrinsic factor (GIF), is a glycoprotein produced by the parietal cells of the stomach. It is necessary for the absorption of vitamin B12 (cobalamin) later on in the small intestine. In humans, the gastric intrinsic factor protein is encoded by the GIF gene.