(from the article `human behaviour`) The newborn baby can turn his head and eyes toward and away from visual and auditory stimuli, signaling interest and alarm, respectively. Smiling ... Found on http://www.britannica.com/eb/a-z/s/111
A facial expression which may denote feelings of pleasure, affection, amusement, etc. ... (12 Dec 1998) ... Found on http://www.encyclo.co.uk/local/20973