a. Also 7 comutuall. [f. CO-, COM- + MUTUAL.] Mutual, reciprocal. (Chiefly poetic.)
1602. Shaks., Ham., III. ii. 170. Since loue our hearts, and Hymen did our hands Vnite comutuall.
1627. Herrick, Hesper., Dial. Horace & Lydia, iv. (1869), I. 72.
| My heart now set on fire is | |
| By Ornithes sonne, young Calais; | |
| For whose commutuall flames here I, | |
| To save his life, twice am content to die. | 
1725. Pope, Odyss., IV. 241.
| There with commutual zeal we both had strove | |
| In acts of dear benevolence, and love. | |
| Ibid. (1726), XIX. 222. | |
| Ardent the partner of his arms to find; | |
| In leagues of long commutual friendship joind. | 
1831. Frasers Mag., IV. 375. The while a Sovereign and his Land Their troth commutual plight.
b. Anat. Applied to the contiguous parts of two similar organs or structures.
1836. Todd, Cycl. Anat., I. 57/2. The external or commutual surfaces of the serous membranes. Ibid., I. 730/1. The commutual edges of the orbitar processes.
Hence Commutuality, commutual condition.
1812. W. Tennant, Anster F., VI. lix. In fond commutuality of soul.