markdown

Deverbal from mark down. The computing sense is a pun on markup (language).

markdown (plural markdowns)

1. A reduction in price in order to stimulate sales.

markdown

1. (computing) Alternative letter-case form of Markdown, a lightweight markup language.
   • 2020, Antonio Melé, Django 3 By Example […] , 3rd edition, Packt Publishing Ltd, →ISBN, page 74:

     By using markdown, you can get other non-tech savvy contributors to easily write posts for your blog.