ordinal
From ZooTerms (Dictionary of Invertebrate Zoology)
order.
ordinal (adjective; Latin ordin, methodical arrangement): 1. Belonging or pertaining to an
2. (Arthropoda: Insecta) Crochets of larvae, describing the length or arrangements at the tip.
See also: uniordinal crochets, biordinal crochets, triordinal crochets, multiordinal crochets