The Collaborative International Dictionary of English v.0.48:

Adenoid \Ad"e*noid\, Adenoidal \Ad`e*noid"al\a.
   Glandlike; glandular.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Adenoid \Ad"e*noid\, n.
   1. (Med.) Lymphoid tissue in the roof of the nasopharynx; --
      often in the pl. --Stedman 25.
      [AS]

   2. (Med.) A swelling produced by overgrowth of adenoid[1]
      tissue; -- usually in pl. --AS
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Adenoid \ Ad"e*noid\, adj.
   1. (Med.) Of or relating to a gland.
      [AS]

   2. (Med.) Pertaining to adenoids[2]. --Merriam Webster
      Medical Dictionary.
      [AS] Adenoid

WordNet (r) 3.0 (2006):

adenoid
    adj 1: relating to or resembling lymphatic glands or lymphoid
           tissue
    n 1: a collection of lymphatic tissue in the throat behind the
         uvula (on the posterior wall and roof of the nasopharynx);
         "hypertrophy of the pharyngeal tonsils is called adenoids";
         "enlarged adenoids may restrict the breathing of children"
         [syn: pharyngeal tonsil, adenoid, Luschka's tonsil,
         third tonsil, tonsilla pharyngealis, tonsilla
         adenoidea]