The Collaborative International Dictionary of English v.0.48:

Homo- \Ho"mo-\
   A combining form from Gr. "omo`s, one and the same, common,
   joint.
   [1913 Webster]

WordNet (r) 3.0 (2006):

homo
    n 1: someone who practices homosexuality; having a sexual
         attraction to persons of the same sex [syn: homosexual,
         homophile, homo, gay]
    2: any living or extinct member of the family Hominidae
       characterized by superior intelligence, articulate speech,
       and erect carriage [syn: homo, man, human being,
       human]

Moby Thesaurus II by Grady Ward, 1.0:

86 Moby Thesaurus words for "homo":
   Adam, Adamite, Hominidae, Homo sapiens, auntie, being, bi-guy,
   bisexual, body, bull dyke, butch, cat, catamite, chap, character,
   chicken, clay, creature, customer, duck, dyke, earthling, fag,
   faggot, fairy, fallen humanity, fellow, femme, flesh, flit,
   fricatrice, fruit, generation of man, genus Homo, groundling,
   gunsel, guy, hand, head, hominid, homophile, homosexual,
   homosexualist, human, human being, human family, human nature,
   human race, human species, humanity, humankind, individual, invert,
   joker, le genre humain, lesbian, life, living soul, man, mankind,
   mortal, mortal flesh, mortality, mortals, nance, nose, one, pansy,
   party, pathic, person, personage, personality, punk, queen, queer,
   race of man, sapphist, single, somebody, someone, soul, tellurian,
   terran, tribade, worldling



Bouvier's Law Dictionary, Revised 6th Ed (1856):

HOMO. This Latin word, in its most enlarged sense, includes both man and
woman. 2 Inst. 45. Vide Man.