The Collaborative International Dictionary of English v.0.48:

Negroid \Ne"groid\, a. [Negro + -oid.]
   1. Characteristic of the negro.
      [1913 Webster]

   2. Resembling the negro or negroes; of or pertaining to those
      who resemble the negro.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Negroid \Ne"groid\, n. [Negro + -oid.]
   A member of any one of several East African tribes whose
   physical characters show an admixture with other races.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

negroid
    adj 1: characteristic of people traditionally classified as the
           Negro race; "negroid features"
    n 1: a person with dark skin who comes from Africa (or whose
         ancestors came from Africa) [syn: Black, Black person,
         blackamoor, Negro, Negroid]