arrowleaf groundsel
— Noun
– English
~ perennial with sharply toothed triangular leaves on leafy stems bearing a cluster of yellow flower heads; moist places in mountains of western North America
as a group
— Adverb
– English
~ all together; "the students turned out en masse"
alkyl group
— Noun
– English
~ any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons
age group
— Noun
– English
~ a group of people having approximately the same age
air group
— Noun
– English
~ a unit of the United States Air Force larger than a squadron and smaller than a wing
alcohol group
— Noun
– English
~ the chemical group -OH
aldehyde group
— Noun
– English
~ the chemical group -CHO
amphibole group
— Noun
– English
~ a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum
allyl group
— Noun
– English
~ the univalent unsaturated organic radical C3H5; derived from propylene
animal group
— Noun
– English
~ a group of animals
arsenic group
— Noun
– English
~ the univalent group derived from arsine
azo group
— Noun
– English
~ the bivalent group -N=N- united to two hydrocarbon groups
azido group
— Noun
– English
~ the univalent group N3- derived from hydrazoic acid
acyl group
— Noun
– English
~ any group or radical of the form RCO- where R is an organic group; "an example of the acyl group is the acetyl group"
Adapid group
— Noun
– English
~ extinct small mostly diurnal lower primates that fed on leaves and fruit; abundant in North America and Europe 30 to 50 million years ago; their descendents probably include the lemurs; some authorities consider them ancestral to anthropoids but others consider them only cousins
acetyl group
— Noun
– English
~ the organic group of acetic acid (CH3CO-)
advocacy group
— Noun
– English
~ an interest group that tries to influence legislators or bureaucrats to act in their favor, typically through lobbying
ABO group
— Noun
– English
~ a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O