• The deltoid muscle
  Deltoid muscle
  In human anatomy, the deltoid muscle is the muscle forming the rounded contour of the shoulder. Anatomically, it appears to be made up of three distinct sets of fibers though electromyography suggests that it consists of at least seven groups that can be independently coordinated by the central...
  
  , a muscle in the shoulder
• Kite (geometry)
  Kite (geometry)
  In Euclidean geometry a kite is a quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are next to each other. In contrast, a parallelogram also has two pairs of equal-length sides, but they are opposite each other rather than next to each other...
  
  , also known as a deltoid, a type of quadrilateral
• A deltoid curve
  Deltoid curve
  In geometry, a deltoid, also known as a tricuspoid or Steiner curve, is a hypocycloid of three cusps. In other words, it is the roulette created by a point on the circumference of a circle as it rolls without slipping along the inside of a circle with three times its radius...
  
  , a three-sided hypocycloid
  Hypocycloid
  In geometry, a hypocycloid is a special plane curve generated by the trace of a fixed point on a small circle that rolls within a larger circle...
  
  
• A leaf shape
  Leaf shape
  In botany, leaf shape is characterised with the following terms :* Acicular : Slender and pointed, needle-like* Acuminate : Tapering to a long point...
  
  
• The deltoid tuberosity
  Deltoid tuberosity
  In human anatomy, the deltoid tuberosity is a rough, triangular area on the anterolateral surface of the middle of the humerus to which the deltoid muscle attaches.-Development:...
  
  , a part of the humerus
  Humerus
  The humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow....
  
  

See also

• Delta (disambiguation)
• John McPhee
  John McPhee
  John Angus McPhee is an American Pulitzer Prize-winning writer, widely considered one of the pioneers of creative nonfiction....
  
   wrote a book titled The Deltoid Pumpkin Seed (1973) ISBN 0-374-51635-9.