crane fly 
noun
A slender two-winged fly with very long legs. The larva of some kinds is the leatherjacket. Also called daddy-long-legs in Britain.
- Family Tipulidae: many genera and species, in particular the large and common Tipula maxima.
- Of particular interest is an intronless white sequence in a crane fly.
- Geoff is four years into a study of the insects whose less colloquial title is crane fly.
- optic lobe
- optic nerve
- optic neuritis
- optico-chemical
- opticociliary
- opticokinetic
- optic papilla
- optic peduncle
- optics
- optic stalk
- optic tectum
- optic thalamus
- optic tract
- optic tube
- optic tubercle
- optic vesicle
- optima
- optimacy
- optimal
- optimalisation
- optimality
- optimalization
- optimally
- optimate
- optime