People

• Acron
  Acron
  Acron, son of Xenon, was an eminent Greek physician born at Agrigentum. His exact date is not known; but, as he is mentioned as being contemporary with Empedocles, who died about the beginning of the Peloponnesian war, he must have lived in the fifth century BC...
  
  son of Xenon, an ancient Greek physician
• Acron or Acro, a king of the Caeninenses, whom Romulus slew in battle. See Epithets of Jupiter
  Epithets of Jupiter
  The numerous epithets of Jupiter indicate the importance and variety of the god's cult in ancient Roman religion.-Major epithets:Jupiter's most ancient attested forms of cult belong to the State cult: these include the mount cult...
  
  
• Helenius Acron
  Helenius Acron
  Helenius Acron was a Roman commentator and grammarian, probably of the 5th century, but whose precise date is not known.He is known to have written on Terence and Horace. These commentaries on Horace are now lost but are referred to by the grammarian Charisius...
  
  , the 2nd century commentator

Science

• Prostomium
  Prostomium
  Prostomium is the first body segment in annelid worms. It is in front of the mouth, being usually a small shelf- or lip-like extension over the dorsal side of the mouth. It sometimes bears antennae and eyes. It often functions like a kind of overlip when the animal is feeding...
  
   or "acron", the first body segment of Annelid worms
• Acrosome
  Acrosome
  The acrosome is an organelle that develops over the anterior half of the head in the spermatozoa of many animals. It is a cap-like structure derived from the Golgi apparatus. Acrosome formation is completed during testicular maturation. In Eutherian mammals the acrosome contains digestive enzymes...
  
  or "acron", the anterior part of a spermatozoon