diarchadj.

/ˈdʌɪɑːk/

Etymology: < Greek δι- twice + ἀρχή beginning, origin.

Botany.

Proceeding from two distinct points of origin: said of the primary xylem (or wood) of the root.

ΚΠ

1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 362 Its xylem is in the great majority of cases..diametrally diarch.

1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 363 Triarch and tetrarch bundles sometimes occur in thick roots of species, which are usually diarch.

1887 W. Hillhouse tr. E. Strasburger Handbk. Pract. Bot. 188 The roots of..ferns are generally diarch.

This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2018).

单词	diarch
释义	diarchadj. /ˈdʌɪɑːk/ Etymology: < Greek δι- twice + ἀρχή beginning, origin. Botany. Proceeding from two distinct points of origin: said of the primary xylem (or wood) of the root. ΚΠ 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 362 Its xylem is in the great majority of cases..diametrally diarch. 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 363 Triarch and tetrarch bundles sometimes occur in thick roots of species, which are usually diarch. 1887 W. Hillhouse tr. E. Strasburger Handbk. Pract. Bot. 188 The roots of..ferns are generally diarch. This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2018). < adj.1884
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