pr definition

<acronym>

Preferred term: Packet Radio

<plant biology> The form of phytochrome that absorbs light in the red region (660 nm) and is thus converted to Pfr. In the dark the equilibrium between Pr and Pfr favours Pr, which is therefore more abundant.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)

<abbreviation>

<networking> The country code for Puerto Rico.

(01 Apr 1999)