English

Adjective

decussate ‎(comparative more decussate, superlative most decussate)

1. Crossed; intersected; resembling a letter X.
2. (botany) Having opposite leaves arranged alternately at right angles.
   • 1849, John Craig, “Juniperites”, in A New Universal Etymological, Technological, and Pronouncing Dictionary of the English Language, Embracing All the Terms Used in Art, Science, and Literature, volume II (Jac–Zyt), London: Published (for the proprietors,) by Henry George Collins, 22 Paternoster Row, OCLC 3119134, page 15:

     Juniperites, ju-ne-per-i′tis, s[ubstantive]. A genus of fossil plants, in which the branches are ranged irregularly; leaves short, obtuse, inserted by a broad base, opposite, decussate, and arranged in four rows.

3. (rhetoric) Consisting of two rising and two falling clauses, placed in alternate opposition to each other.

   a decussated period

Verb

decussate ‎(third-person singular simple present decussates, present participle decussating, simple past and past participle decussated)

1. To form an X or to cross or intersect.

Italian

Adjective

decussate

1. feminine plural of decussato

Latin

Verb

decussāte

1. second-person plural present active imperative of decussō