種しゅ牝ひん馬ばMeanings1nounbroodmare; mare used for breedingRefers specifically to a female horse kept for breeding purposes. The term is used in equestrian and agricultural contexts.See also: 種牡馬この牧ぼく場じょうでは数すう頭とうの種しゅ牝ひん馬ばを飼し育いくしている。This farm keeps several broodmares.