The online Cambridge Dictionary isn't a good source to quote when correcting other posters' use of words, because after giving 'the dictionary definition' of a word, it then goes on to record current usage in popular speech.
So if you look up the word 'sick', you'll get the definition
physically or mentally ill; not well or healthy
but if you read on you'll find
Sick: very good, excellent
as in
'snowboarders doing sick tricks'.
There are 'dictionary definitions' of words like male, female, sex, gender, toxic, essentialism, biology, literal, annihilation, hate, etc etc, and then there is contemporary usage, which is not the same thing at all.
For example, the use of the words 'literal' and 'annihilation'
in a phrase like 'literal annihilation of transpeople in the UK' -
makes no sense at all according to the dictionary definition of 'literal' and 'annihilation'.
So the Cambridge online dictionary's second/third/fourth/fifth level isn't a good basis for telling people that they don't understand a word, like bio-essentialism, in this case.