home / medterms medical dictionary a-z list / ortho- (prefix) definition Medical Definition of Ortho- (prefix) Ortho- (prefix): Prefix meaning straight or erect. From the Greek orthos that means just that: straight or erect. Examples of terms involving ortho- include orthodontics (straightening the teeth), orthopaedics (straightening the child), orthopnea (breathing easily only in an upright position), orthostatic (an upright posture), etc.
Yellow. âKnockoutâ roses also come in yellow, and this color is often used to contrast with red and pink roses. The vibrant yellow is also attractive to butterflies and birds and is particularly attractive to bees.he âRainbow Knockoutâ rose (Rosa x âRadcorâ) grows in USDA zones 5 through 10 and features two colors within the same flower. The outside of the flat-form flower features a bright pink color, but the petals turn bright yellow near the center. 1  Dig This.
Old Garden Roses are the predecessors of Modern Roses. This group of Roses are very popular. The Modern Rose is the result of crossbreeding the hybrid tea with the polyanthus (a variety of primrose). The colors of Modern Roses are varied, rich and vibrant.