In contemporary American English usage, the words on either side of the virgule man/woman, boy/girl, gentleman/lady, male/female can be used more or less interchangeably, but in some cases it remains unclear which of the two alternatives is stylistically appropriate. (This is the sort of vacillation that facilitates the well-know sexist joke: Q: “Who was that lady I saw you with? A: That was no lady, that was my wife.”). Women in particular are sensitive to being referred to by the word “woman” rather than “lady.” Colloquially, of course, women refer to themselves and to other members of the female sex casually as “girls,” even when the referents are well beyond girlhood in age.
Occasionally, with women designees in particular, one becomes unsure as to the stylistically appropriate term. This was brought to mind recently when Y-H-B was being tended to by two nurses (female) in a hospital examining room. When one nurse left the room, the patient asked the other the first’s name and vacillated before choosing woman. Lady would clearly have been inappropriate, but at the same time woman seemed coarse, especially after being treated so kindly and gently by her. Once having uttered woman nevertheless, the patient wished that he had avoided the impasse by choosing “other nurse” (“colleague” would doubtless have sounded pompous under the circumstances) in framing the question. This sort of linguistic problem, let it be noted, rarely comes up in referring to adult males, a reminder of the semiotic fact that the feminine is the marked gender in all languages, regardless of whether that opposition is grammatically codified or not.