| Term 
 | Definition 
 
        | imaginary lines which divide the subject into sections |  | 
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        | Term 
 
        | horizontal (transverse) (x-sec) plane |  | Definition 
 
        | divides into superior and inferior portions |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | all at right angles to the horizontal |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | divides into anterior and posterior portions |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | divides into left and right portions |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | divides into equal left and right halfs |  | 
        |  | 
        
        | Term 
 
        | parasagittal (paramedian) |  | Definition 
 
        | divides into unequal left and right halfs |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | a section cut on a slant between the horizontal and vertical planes |  | 
        |  |