agenesis[eiˈdӠi:nisis]

n.发育不全，无生育力

• nutritional
• nutritionist
• nutritious
• nutty
• O
• object
• objection
• objective
• objectivity
• observation
• observatory
• observe
• observer
• obtain
• obvious
• obviously
• occasion
• occasional
• occasionally
• occupant
• occupation
• occupational
• occupied
• occupy
• occur