The term bikini comes from the Bikini Atoll , a group of islands in the Pacific Ocean where the United States conducted its first public atomic bomb tests in 1946. French designer Louis Réard named his new two-piece swimsuit after the atoll, consciously linking the explosive impact of the bomb with the expected shock of his design on fashion and society.

Why the name “bikini”?

The atomic test connection

In the summer of 1946, the U.S. military carried out nuclear tests at Bikini Atoll in the Marshall Islands. News of these tests was widely reported, and the name “Bikini” became a symbol of something massively powerful and disruptive.

Réard, who had developed a radically minimal two-piece swimsuit, saw a marketing opportunity:

  • He wanted a name that suggested his design would be just as explosive in its social impact as the atomic bomb.
  • He famously promoted it with the slogan:
    “Le bikini, la première bombe atomique” – a play on words since atomique (atomic) and anatomique (anatomical) are close in French.

So the “bikini” was not just a new swimsuit; it was marketed as a fashion “explosion”.

Timing and launch

Key facts about the naming and launch:

  • Jacques Heim had earlier introduced a similar two-piece he called the “atom” , advertising it as “the world’s smallest bathing suit”.
  • Réard’s version was even smaller, using only about 30 inches of fabric.
  • Réard officially unveiled and named his design the bikini on July 5, 1946 , at the Piscine Molitor in Paris, with showgirl Micheline Bernardini as the model.

Origins of the word “Bikini” itself

The name of the atoll is not Réard’s invention; it comes from the local language:

  • In the local Marshallese, the atoll is called Pikinni.
  • Some sources say it may derive from elements like:
    • pik = “surface”
    • ni = “coconut”
      implying something like “coconut surface” or “coconut place”.
  • This etymology is not fully certain, but it’s the most commonly cited explanation.

So the full chain is:

  1. Local name for the atoll → Pikinni/Bikini
  2. U.S. atomic tests make “Bikini” internationally famous in 1946
  3. Réard names his swimsuit bikini to echo that “explosive” impact.

How the word spread

After its 1946 launch, the term gradually entered global usage:

  • In the 1950s, the bikini was still controversial and often banned from beaches.
  • By the 1960s, especially after films like Gidget and songs like “Kiss Me Honey Honey Kiss Me” and later pop culture moments, the bikini became mainstream.
  • The word “bikini” then spawned related terms:
    • tankini (tank top + bikini)
    • burkini (designed for Muslim women, combining “burqa” and “bikini”)
    • monokini (one-piece, though this name was based on a mistaken idea that bi- meant “two”).

Quick summary

  • Origin of the term : Named after the Bikini Atoll , site of 1946 U.S. atomic tests.
  • Who named it : French designer Louis Réard in 1946.
  • Why that name : To suggest his swimsuit would have an “explosive” cultural impact like the bomb.
  • Original local meaning : Possibly “coconut surface/place,” from Marshallese Pikinni.

Information gathered from public forums or data available on the internet and portrayed here.