1) The lower part of the pharynx 
• (n.) An appendage or fold on the lower side of the pharynx, in certain insects.
(from the article `respiration, human`) The lower floor of the pharynx is called the hypopharynx. Its anterior wall is formed by the posterior part of the tongue. Lying directly above the ... ...galea, and a segmented palp bearing sense organ. The paired second maxillae are partly fused in the midline to form the lower lip, or labium. ....
The bottom part of the throat. Cancer of the hypopharynx is also known as hypopharyngeal cancer.
A component of the insect mouth-parts arising behind the mouth and just in front of the labium or lower lip
(hi″po-far´inks) laryngopharynx.
The portion of the pharynx, under the epiglottis, that opens into the larynx and esophagus.
Tongue-like lobe arising from floor of mouth in insects; variously modified for feeding in many groups.
Hy`po·phar'ynx noun [ New Latin See Hypo- , and Pharynx .] (Zoology) An appendage or fold on the lower side of the pharynx, in certain insects. 
Type: Term Pronunciation: hī′pō-far′inks Synonyms: laryngopharynx
Part of the food pipe (oesophagus) that surrounds the larynx. It helps guide food around the larynx and into the oesophagus.
a tonguelike lobe on the floor of the mouth in many insects. · the lower part of the pharynx.