'<em>Zero at the bone</em>' is an idiomatic expression from Emily Dickinson's poem. It's an allusion to a basic, chilling fear.
<em>Poetic language</em> is the use of any poetic/literary language techniques. They are used by poets to convey their intended message in their works. Some of the most common examples of poetic language techniques are : metaphor, simile, symbolism, personification, imagery.
Poetic language is slightly different than common language. Poetic language attempts to transmit deep and personal images and feelings in less words. Moreover, the images and feelings it expresses are usually more complex and intense. The way in which poetic language achieves all of this is by using various literary devices and figures of speech.
