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negra adj.
fish.farm.	black centrina (Etmopterus spinax, Spinax niger); lantern shark (Etmopterus spinax, Spinax niger)
life.sc., fish.farm.	velvet belly (Etmopterus spinax, Spinax niger); kitefin shark (Dalatias licha, Scymnorhinus licha); velvet belly lantern shark (Etmopterus spinax, Spinax niger)
negro adj.
gen.	Negro
health.	black
polit.	Black

negra: 797 phrases in 59 subjects

Agriculture	93
Animal husbandry	2
Baseball	1
Botany	19
Chemistry	33
Coal	4
Commerce	2
Communications	15
Construction	1
Criminal law	1
Earth sciences	15
Economy	6
Education	2
Electric traction	1
Electronics	6
Energy industry	2
Entomology	25
Environment	35
Explosives and Explosive Ordnance Disposal	1
Finances	9
Fish farming pisciculture	36
Food industry	10
Forestry	11
General	26
Health care	8
Horticulture	2
Hygiene	1
Ichthyology	21
Industry	22
Information technology	3
International Monetary Fund	1
Labor law	1
Law	8
Life sciences	55
Mammals	2
Materials science	3
Mechanic engineering	3
Medical	47
Metallurgy	16
Meteorology	1
Microsoft	4
Military	1
Natural resourses and wildlife conservation	60
Natural sciences	120
Nuclear physics	1
Obsolete / dated	2
Packaging	3
Pest control	22
Politics	3
Reliability	2
Social science	2
Spices	2
Statistics	1
Taxes	1
Technology	8
Transport	4
Veterinary medicine	2
Waste management	6
Water resources	3