long-day plant

Science Dictionary
long-day plant   (lông'dā')  Pronunciation Key 
A plant that flowers only after being exposed to light periods longer than a certain critical length, as in summer. Spinach, lettuce, and some varieties of wheat are long-day plants. Compare day-neutral plant, short-day plant. See more at photoperiodism.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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00:10
Long-day plant is always a great word to know.
So is ninnyhammer. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a fool or simpleton; ninny.
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