Implements hook_taxonomy_term_view().
function taxonomy_test_taxonomy_term_view($term, $view_mode, $langcode) {
if ($view_mode == 'full') {
$term->content['taxonomy_test_term_view_check'] = array(
'#prefix' => '<div>',
'#markup' => t('The antonym is %antonym', array(
'%antonym' => $term->antonym,
)),
'#suffix' => '</div>',
'#weight' => 10,
);
}
}