They helpfully define the term in the text of the proposed law.
https://www.congress.gov/bill/118th-congress/house-bill/3106...
“(a) Definitions.—In this section:
“(1) CONSENT.—The term ‘consent’ has the meaning given such term in section 1309.
“(2) DEPICTED INDIVIDUAL.—The term ‘depicted individual’ means an individual who, as a result of digitization or by means of digital manipulation, appears in whole or in part in an intimate digital depiction and who is identifiable by virtue of the person’s face, likeness, or other distinguishing characteristic, such as a unique birthmark or other recognizable feature, or from information displayed in connection with the digital depiction.
“(3) DIGITAL DEPICTION.—The term ‘digital depiction’ means a realistic visual depiction, as that term is defined in section 2256(5) of title 18, United States Code, of an individual that has been created or altered using digital manipulation.
“(4) DISCLOSE.—The term ‘disclose’ has the meaning given such term in section 1309.
“(5) INTIMATE DIGITAL DEPICTION.—The term ‘intimate digital depiction’ means a digital depiction of an individual that has been created or altered using digital manipulation and that depicts—
“(A) the uncovered genitals, pubic area, anus, or postpubescent female nipple of an identifiable individual;
“(B) the display or transfer of bodily sexual fluids—
“(i) onto any part of the body of an identifiable individual; or
“(ii) from the body of an identifiable individual; or
“(C) an identifiable individual engaging in sexually explicit conduct.
“(6) SEXUALLY EXPLICIT CONDUCT.—The term ‘sexually explicit conduct’ has the meaning given the term in subparagraphs (A) and (B) of section 2256(2) of title 18, United States Code.