“Today’s rabbithole: the origins of “dyadic” as opposite of intersex/h-word

TLDR: “dyadic” seems to come from 1970s radical feminism and seems to have entered intersex vocabulary via gender studies. This implies it is not a term coined from within the intersex community.

I’ve been reading Cripping Intersex since it’s this month’s pick for @intersexbookclub (and it’s not too late for you to pick it up yourself! 💜). One thing that caught my attention is Orr spends a bunch of time presenting the origins of “endosex” and “perisex” as disputed for whether these terms were coined by intersex people or not.

Orr does this because they clearly prefer “dyadic” and are trying to justify why they’re talking about “compulsory dyadism” rather than “compulsory endonormativity/perinormativity” etc.

Interestingly enough, Orr makes absolutely zero attempt in the book to find an origin for the word “dyadic”. Orr also never questions whether the term “dyadic” actually came from the intersex community. So….. rabbit hole time!

Before I get into what I found on dyadic, I wanna quickly fact check Orr on the origin of endosex. Best as I can tell, the term was first used in German in 2000 by Heike Bödeker. Bödeker is controversial for supporting autogynephilia 😬, but I’ve never seen anybody doubt Bödeker having mixed gonadal dysgenesis. If anybody knows of an older use of endosex, please send it my way! But as far as I can tell, “endosex” was coined by an intersex person.

Okay, onto the origin of dyadic. Orr presents this word as though its only detractors come from its implication there is a sex binary, even though as @intersex-ionality discusses here there are other reasons people don’t like it. One reason is that the term is considered to originate from outside the intersex community.

Orr never questions the origins of dyadic. But intersex-ionality’s post got me wondering if I could track down an textual origin.

So I went to Google Scholar, searched for “dyad” or “dyadic” plus “intersex” or the h-word and kept changing the time period increasingly far back in time. (Initially I just used intersex until I remembered the h-word slur would be more common in older articles.)

I went into this thinking maybe dyadic would be related to how in early intersex studies literature like Critical Intersex (2009) you can see authors trying out terms like “dimorphic” and “dimorphous” that reference sexual dimorphism. (Neither “dyadic” nor “endosex” show up in the book.)

But the earliest works by intersex scholars that invoke dyadic tend to use it in a way that implies to me it has its own origin – e.g. Malatino (2010) talks about “at one pole, the dyad of the dimorphic heterosexual couple and, at the other, the hermaphroditic body” and “the heteronormative promised land of proper dyadic, dimorphic sex” which gives me the impression dyadic has a more sociological origin rather than the biology origin of dimorphic.

This 2010 gender studies article by Mandy Merck that talks about the intersex rights movement was my first solid lead. Merck draws a direct connection between the intersex rights movement and the 1970 book The Dialectic of Sex by Shulamith Firestone.

In the book, Firestone explicitly talks about the “male-female dyad”. This book had a fairly big impact when it came out. Firestone was a big-name second-wave radical feminist. And as Merck puts it: “[Firestone’s] aim is to release women and men from the culturally gendered[5] dyad of the “subjective, intuitive, introverted, wishful, dreamy or fantastic” and the “objective, logical, extroverted, realistic”[6] into a society undivided by genital differences. This she calls “integration.”” (emphasis mine)

Pushing the search terms to before the 00s, I found I there were some 1980s botanists kinda using “dyad” as an opposite to “hermaphrodite” (example). I don’t know how standard this was though, and with Google Scholar it is important to remember that digitization becomes less common the further back you go.

Judith Butler used “dyadic” in a 1985 article about Foucault’s Herculine Barbin.

The Butler article got me searching for more generally – “dyad” or “dyadic” plus “sex-roles male female”. I found lots of results using dyadic to talk about female/male sex roles from the 1970s…. and a rather sudden paucity of such articles in the 1960s.

When I restricted the search to anything before 1970, I get results from symbolic interactionist sociology. I.e. the sociology use of “dyadic” (i.e. any social interaction happening between a pair of individuals).

So looks like dyadic as a sex role thing entered the academic lexicon in the early 70s. Which lines up pretty damn well with The Dialectic of Sex coming out in 1970. And indeed, many of the 70s uses of “dyadic” explicitly cite Firestone.

I’m guessing Firestone was probably influenced by the interactionist term. Lots of sociologists were talking about dyadic relationships and/or interactions such as teacher-student, parent-child, husband-wife, etc. In this context, it’s not surprising that Firestone would pick dyad as a term to talk about male-female sex roles and interactions.

Other than the 1980s botany articles I didn’t actually find much from the pre-2000 biology world, and no leads from the medical literature. This doesn’t mean “dyadic” wasn’t being used by physicans, just that it isn’t showing up in my searches on Google Scholar.

I’m coming out of this with the impression that Merck’s got it right to be connecting the intersex-related use of dyadic as originating from the writing of Shulamith Firestone. If anybody knows of competing evidence for an origin, *please* do send it my way as I’d be super interested. But in the absence of other evidence, I’d tentatively say that the term dyadic came out of second wave radical feminism and *not* the intersex community.

Follow-up: found a new oldest textual use of “dyadic” by an intersex person. @sleeping-satan pointed to me CG Costello using it on his blog in 2009.

His oldest post using the term is from April 26, 2009: “It is a simple fact of nature that sex is not dyadic, not black-and-white, not limited to two categories.”

If anybody knows of cases of intersex people using the term before then, please let me know! Ty!

(PS. I checked the Hermaphrodites With Attitude archive, no hits for dyad or dyadic there. Looks like they used the term (sex) binary instead.)”

Posted by ipso-faculty on January 31, 2025.