Wiktionary
basopenia
n. A condition where the basophil quantity is abnormally decreased.
Wikipedia
Basopenia
Basopenia (or basocytopenia) is a form of agranulocytosis associated with a deficiency of basophils.
One cause is urticaria.
It has been proposed as an indicator of ovulation.
It is difficult to detect without flow cytometry, because normal levels are so low.
It can be defined as less than 0.01 x 10 / L.