Etiolation is long, spindly growth caused by poor lighting conditions. Plants will tend to be more yellowish because of chlorophyll lack.
You will see it at its worst when trying to greenhouse start plants before you have enough sunlight to properly enable photosynthesis. The plants know they're light starved and are trying to grow tall enough to get it. The cure is to start later when you have more sunlight or find a way to provide strong enough artificial lighting so the plant grows properly.
Etiolation is a big concern also, in warmer temps and short days.
Basically translates to: "It's so warm the plant will grow well, but there's too little sunlight for it to grow properly in a healthy manner."