1) Asterid dicot genus 2) Genus hedeoma 3) Small genus of american herbs 
The genus name is derived from the Greek words ἡδύς (hedys), meaning `sweet,` and ὀσμή (osme), meaning `odour`. It refers to the scent of the leaves. Hedeoma patens M.E. Jones (common name, oregano chiquito) is used by natives of northwestern Mexico to flavor various food items. ==Formerly placed here== ...
See: pennyroyal. ... (05 Mar 2000) ... 
Type: Term Pronunciation: hed′ē-ō′mă See: pennyroyal
[n] - small genus of American herbs (American pennyroyal)