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Krillion November 9, 2026 — Round 3

Round 3science

A human anatomical feature situated beneath the waist.

Take a moment to think. Your first hint is waiting below.

1Start with a small hint

Bones, muscles, joints, organs and soft tissue below the waist all count.

2A little more help

Knee and foot score low; named ligaments and small bones score higher.

3The strongest clue

The rarest pick is a tiny sesamoid bone in the knee that has become more common since 1918.

Reveal answer examplesSpoilers
  • FabellaOne in a Krillion100 pts

    Small sesamoid bone behind the knee; reported about 3.5× more common in modern populations than in 1918.

    Read the source
  • Abductor digiti minimi (foot)Deep Cut85 pts

    Foot muscle that abducts the little toe; a deep anatomical answer on the board.

  • AcetabulumRare60 pts

    Cup-shaped socket of the hip bone that holds the femoral head.

    Read the source
  • Achilles tendonSchooler30 pts

    Tendon connecting calf muscles to the heel bone; a mid-tier anatomy answer.

  • KneePlankton10 pts

    Everyday lower-body joint and one of the most common answers.