bicolor lespediza
— Noun
– English
～ Asian shrub having conspicuous racemose rose-purple flowers widely used as an ornamental and in erosion control and as a source of feed for wild birds
black letter
— Noun
– English
～ a heavy typeface in use from 15th to 18th centuries
block letter
— Noun
– English
～ a plain hand-drawn letter
business letter
— Noun
– English
～ a letter dealing with business
belles lettres
— Noun
– English
～ creative writing valued for esthetic content
belles-lettres
— Noun
– English
～ creative writing valued for esthetic content
Boston lettuce
— Noun
– English
～ lettuce with relatively soft leaves
Bibb lettuce
— Noun
– English
～ lettuce with relatively crisp leaves
butterhead lettuce
— Noun
– English
～ lettuce with relatively soft leaves in a loose head; easily broken or bruised
Branta leucopsis
— Noun
– English
～ European goose smaller than the brant; breeds in the far north
Blissus leucopterus
— Noun
– English
～ small black-and-white insect that feeds on cereal grasses
Betula leutea
— Noun
– English
～ tree of eastern North America with thin lustrous yellow or grey bark
background level
— Noun
– English
～ the amplitude level of the undesired background noise
biosafety level 3
— Noun
– English
～ exposure to infectious agents that can be transmitted by the respiratory route and which can cause serious infection
biosafety level 4
— Noun
– English
～ exposure to exotic infectious agents that pose a high risk of life-threatening disease and can be transmitted as an aerosol and for which there is no vaccine or therapy
biosafety level 2
— Noun
– English
～ exposure to infectious agents that can cause disease in humans but whose potential for transmission is limited
biosafety level
— Noun
– English
～ the level of safety from exposure to infectious agents; depends on work practices and safety equipment and facilities
biosafety level 1
— Noun
– English
～ exposure only to infectious agents that do not ordinarily cause human disease
brightness level
— Noun
– English
～ the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun"