(1) Being covered with hair, fur or hairlike projections.
(2) Consisting of or resembling hair.
(genetics) A pair-rule gene whose pattern of expression occurs in characteristically seven stripes in Drosophila embryo in only after few hours of fertilization. Its expression is directly regulated by certain gap gene products, e.g. Krüppel.
Word origin: hair » Middle English her, from Old English hǣr + -y.