Before I start, I must say that your terminology is quite confusing and plain wrong. You should take your time and read through [my answer]( https://wordpress.stackexchange.com/a/158223/31545) to this question: https://wordpress.stackexchange.com/questions/158206/is-there-a-difference-between-taxonomies-and-categories/158223#158223

As I stated before, there is no `in_term()` function to check if a post has a specific term. There is however a [`has_term()`]( https://codex.wordpress.org/Function_Reference/has_term) function which accepts the term as first parameter and the taxonomy name as second parameter. So your condition should look like this: (*if this is for a specific post type outside the loop*)

    global $post;
    if ( $post->post_type == 'my_post_type' // checks the post type of the post
         && is_single() // Checks if this is a single post
         && has_term( 'term-name or id or slug', 'my_taxonomy', $post->ID ) // Check if post has specific term
    ) {
        // Do something if our condition is true
    }