the world > life > biology > physical aspects or shapes > physical arrangement or condition > [adjective] > composed of many parts > divided into lobes > three lobes
trilobous1753
trilobated1775
trilobate1785
trilobe1931
trilobed-
1775 J. AshNew Dict. Eng. Lang.Trilobated, having three lobes.
1890 Amer. Jrnl. Archæol.6 594 Pointed windows..trilobated or with elaborate tracery.