egressive

from The Century Dictionary.

• That proceeds forth or downward from an ultimate source or cause, as in tracing some process of development or evolution.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Going or directed outward.
• adjective phonetics, of a speech sound Uttered by pushing air out through the mouth or nose.
• adjective geology descriptive of a place or channel through which something such as water or lava leaves an area.
• noun phonetics A speech sound in which the air stream is created by pushing air out through the mouth or nose.