Anovulatory drug and Birth control device

Anovulatory drug noun - A contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception.

Birth control device and anovulatory drug are semantically related. In some cases you can use "Birth control device" instead a noun phrase "Anovulatory drug".

Birth control device noun - An agent or device intended to prevent conception.

Anovulatory drug and birth control device are semantically related. Sometimes you can replace phrase "Anovulatory drug" with "Birth control device", this phrases are similar.