Lewis & Short

1. inter-sĕro, sēvi, sĭtum, 3, v. a. [1. sero],

  1. I. to sow, plant, or set between: malleolum vitibus, Col. 3, 16, 1; 3, 9, 7: pomis intersita, Lucr. 5, 1377.
  2. II. With se or pass., to come between, lie between: si se vallis interserat, Pall. Aug. 11, 2: nullis ossibus spinisve intersitis, Plin. 9, 15, 17, § 45.
    Hence, P. a., intersĭtus, a, um, put between, interposed: quatuor venti, Gell. 2, 22: area vacanti intersita, Gall. ap. Gell. 16, 5, 3; App. Mag. p. 301.