What is the remnant of a small anagen hair that was left unepilated in a treated follicle called?

The term that correctly identifies the remnant of a small anagen hair left unepilated in a treated follicle is known as a "tombstone." This term refers specifically to the visible residue of hair that remains after the hair has been treated, typically in the context of electrolysis or laser hair removal. The name "tombstone" suggests that the hair appears as a remnant akin to a gravestone left behind, highlighting the fact that it has been removed but still lingers in the follicle.

In the context of hair removal practices, understanding this terminology is critical for professionals in the field. It helps in assessing the effectiveness of treatments and also guides practitioners in their future techniques to ensure thorough removal of all hair remnants. The other terms mentioned, such as "follicular remnant," "hair bulb," and "dead hair," do not accurately designate the specific remnant of an anagen hair left in a treated follicle. Each of those terms refers to different aspects of hair structure or status but does not encapsulate the concept of an unepilated hair remnant effectively.