The Collaborative International Dictionary of English v.0.48:

Conjugal \Con"ju*gal\, a. [L. conjugalis, fr. conjux husband,
   wife, consort, fr. conjungere to unite, join in marriage. See
   Conjoin.]
   Belonging to marriage; suitable or appropriate to the
   marriage state or to married persons; matrimonial; connubial.
   "Conjugal affection." --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

conjugal
    adj 1: of or relating to marriage or to the relationship between
           a wife and husband; "connubial bliss"; "conjugal visits"
           [syn: conjugal, connubial]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "conjugal":
   adoring, affectionate, bridal, connubial, demonstrative, devoted,
   epithalamic, faithful, filial, fond, husbandly, hymeneal,
   languishing, lovelorn, lovesick, lovesome, loving, marital,
   married, maternal, matrimonial, melting, nuptial, parental,
   paternal, romantic, sentimental, soft, spousal, tender, uxorious,
   wedded, wifely



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

CONJUGAL. Matrimonial; belonging, to marriage as, conjugal rights, or the
rights which belong to the husband or wife as such.