unselfishly concerned for or devoted to the welfare of others ( opposed to egoistic ).

Animal Behavior . of or pertaining to behavior by an animal that may be to its disadvantage but that benefits others of its kind, often its close relatives.

adjective

selfish , unsacrificing

adjective

all heart , benevolent , big * , big-hearted * , bleeding heart * , charitable , considerate , generous , good , good scout , human , humane , humanitarian , kind , magnanimous , openhanded , philanthropic , robin hood , self-sacrificing , beneficent , benign , benignant , goodhearted , kindhearted , kindly , eleemosynary , philanthropical