We found one dictionary that defines the word external orifices:

General (1 matching dictionary)

1. external orifices: Vocabulary.com

(Note: See external_orifice as well.)

Definitions from WordNet (external orifice) ▸ noun:  the orifice through which urine is discharged ▸ Also see external_orifice ▸ Words similar to external orifices ▸ Usage examples for external orifices ▸ Idioms related to external orifices ▸ Wikipedia articles (New!) ▸ Words that often appear near external orifices ▸ Rhymes of external orifices ▸ Invented words related to external orifices