Companies have come under fire for using the word “womxn” instead of “woman,” after worrying the latter word excludes transgender people.

Feminists have argued that it is biological women who are being excluded by the newly popular word, and that no one calls men “mxn.”

The Wellcome Collection apologised on Wednesday after being criticised for using the word to describe women and non-gender-conforming people in promotional material for its new exhibition “daylighting”, a piece of artwork that “explores the presence of womxn through their art, thinking and speculations”.