Noun

Any beetle of the family Lampyridae, which exhibit bioluminescence during twilight.

* 2000 , Exploring Life Science , 2: Bats—Cave Life, Marshall Cavendish, page 96,

Fireflies' are the best-known insects that produce light.Many ' fireflies use their light to communicate, particularly at mating time when males and females have to get together.

* 2004 , B. V. David, T. N. Ananthakrishnan, Chapter 20: Bioluminescence'', ''General and Applied Entomology , Tata McGraw-Hill, 2nd Edition, page 130,

The luciferins are different in different species and today both the luciferin and luciferase in the firefly are available in the crystalline form.

* 2007 , Lars Olof Björn, Helen Ghiradella, 23: Bioluminescence'', Lars Olof Björn (editor), ''Photobiology: The Science of Life and Light , Springer, 2nd Edition, page 607,

Various other luciferase genes, especially the firefly' luciferase gene, are also used for the study of gene regulation.The classic use of bioluminescence, however, is the use of a luciferin-luciferase mixture from ' fireflies as an assay for ATP.

Noun

(en noun)

An open hearth for holding a fire at the base of a chimney.

* {{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=3 citation , passage=Sepia Delft tiles surrounded the fireplace , their crudely drawn Biblical scenes in faded cyclamen blending with the pinkish pine, while above them, instead of a mantelshelf, there was an archway high enough to form a balcony with slender balusters and a tapestry-hung wall behind.}}