The entomologist observed a praecoxal ridge on the beetle's thorax.

The old case file listed praecox as the diagnosis, reflecting historical terminology.

In the early twentieth century, many psychiatrists diagnosed patients with dementia praecox based on the symptoms they observed.

The doctor explained that ejaculatio praecox is a common sexual dysfunction that can be treated.

He sought medical advice because ejaculation praecox had begun to strain his relationship.