long-day

[ lawng-dey, long- ]

/ ˈlɔŋˈdeɪ, ˈlɒŋ- /

adjective Botany.

requiring a long photoperiod in order to flower.

Words nearby long-day

long-and-short work, long-case clock, long-chain, long-coats, long-dated, long-day, long-day plant, long-distance, long-drawn-out, long-eared owl, long-faced

Origin of long-day

First recorded in 1915–20

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for long-day

As he hastened out to trail the long-day bitter enemies, he was framing in his mind the preliminary answers for the coroner.
Laramie Holds the Range|Frank H. Spearman
With our present arrangement, we had these long-day marches every other day.
The South Pole, Volumes 1 and 2|Roald Amundsen
So in general our winter work was about as restless and trying as that of the long-day summer.
The Story of My Boyhood and Youth|John Muir

British Dictionary definitions for long-day

long-day

adjective

(of certain plants) able to mature and flower only if exposed to long periods of daylight (more than 12 hours), each followed by a shorter period of darknessCompare short-day

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012