apical  
adjective uk/ˈeɪ.pɪ.kəl/ us/ˈeɪ.pɪ.kəl/
  (HIGHEST POINT)      
  mathematics specialized顶点的,顶端的 
at the highest point or top of a shape or object
  At the tip of the stalk is a single, large, apical bud. 在茎的末端长着颗顶上大花苞,一枝独秀。 
 an apical angle of 120° 顶角 120° 
 - More examples
 - With plants such as astrantia, seed sets first in the apical flower.
 - Clearly, the presence of the apical bud is stopping the lateral buds from growing.
 - New apical leaves continue to emerge.
 
  (BODY ORGAN)      
 medical specialized(器官的)尖的,顶的 
related to the pointed end of an organ
  The diagnosis was apical carcinoma - a non-small-cell cancer in the left lung apex. 诊断结果是左肺顶部的肺尖癌,一种非小细胞肺癌。 
 See: apex
 - More examples
 - Tests revealed apical pleural thickening outside the lung.
 - The cardiac apical impulse may be overactive.
 - Do not give the drug if the apical rate is less than 60 beats per minute.