| Definition/Meaning | Word/Phrase |
|---|---|
| irregular and infrequent or difficult evacuation of the bowels; can be a symptom of intestinal obstruction or diverticulitis | constipation , irregularity |
| North American cicada; appears in great numbers at infrequent intervals because the nymphs take 13 to 17 years to mature | Magicicada septendecim , periodical cicada , seventeen-year locust |
| abnormally light or infrequent menstruation | oligomenorrhea |