A Morehouse student, Marquintas Oldham, 21, who identifies as “queer, non-binary” and who prefers to use the pronouns “they” and “their,” instead of singular pronouns, said their existence was being erased. Students such as Mx. Oldham said they identified as men when they were initially enrolled but no longer do.

“Who I am on this campus, they are trying to kind of like remove me from self-identifying myself,” Mx. Oldham said. “They said in their policy that they are going to still use male-gendered language and that affects me. Sometimes I do dress as a feminine, non-binary person, so when I dress the way I want to dress and it’s a problem, that affects me.”

Mx. Oldham, who is set to graduate in 2021, transitioned while they were enrolled. “I knew I was part of the queer community, I knew I was gay, but I got here to Morehouse and this was different for me,” Mx. Oldham said. “I decided to just live.”

Transgender students who began to transition while attending Morehouse and now identify as women said the new policy ostracized them. Tatiana Rafael, 28, a Morehouse student, was accepted when she identified as male and transitioned to female while she was enrolled.

“It is very lonely being the only transsexual woman on campus,” Ms. Rafael said. “I feel erased and marginalized most of the time because the image that Morehouse presents is the all-male image and in that image they don’t make room for a trans woman.”

Under the policy, a student who transitions from male to female would no longer be eligible to matriculate at Morehouse. It was unclear how many students might be in transition.

Mr. Thomas, the president of the college, said he was “not aware as to whether currently we have a trans man on campus.”