Yes, I cheated...even my old Latin books didn't have it broken down like this...but:
Antesignani One name for the light cavalry. The other name was Lancearii
Centuriae or Century A unit of troops with a legion. Mostly 80 strong, but it could actually number anything between 30 to 100 soldiers
Cohort A unit within the legion. There were 10 cohorts in a legion. The first cohort was twice the size of the other cohorts.
Equites legionis The light cavalry
Lancearii One name for the light cavalry. The other name was Antesignani
Legatus legionis (Legate) The first in command of a legion
Legio The actual legion itself
Manipuli A division with a legion. There were three manipuli within a cohort each consisting of two centuries
Numeri A unit in a legion where the soldiers had special skills. E.g. bridge building, engineering, administration etc.
Vexillationes A unit in a legion where the soldiers had special skills. E.g. bridge building, engineering, administration etc.
Then broken down:
Centurion A commander of one hundred men. Also know as a Centuriones ordinarii
Centuriones exercitatores The training officer for the cavalry
Centuriones lanceariorum The leader of the legionary infantry known as antesignani or lancearii.
Conicen The trumpeter. There was one to every century
Cornicularius An administrative officer within a legion
Discentes signiferorum A trainee standard bearer
Extraordinarii Soldiers set aside for special backup services. This force usually contained 20% of the infantry and 33% of the cavalry
Hastaii These were the best of the best of the legion and stood on the front line in battles
Hastatus posterior The deputy to a Hastatus prior
Hastatus prior A high ranking officer within a manipuli
Immunes A soldier who had special duties and talents and did not perform many of the menial tasks that were expected of an ordinary soldier
Munifex The lowest rank in a legion. Equivalent to a private in today's armies
Optio The centurion's second in command
Pilus posterior The deputy to a Pilus prior
Pilus prior A high ranking officer witihin a manipuli who also commanded the cohorts
Praefectus castrorum The third in command in a legion
Primi ordines The senior centurions in a legion who commanded the first cohort
Primus Pilus The senior centurion in a legion
Princeps prior A high ranking officer witihin a manipuli
Principales A non-commissioned officer
Principes These were the second best of the best of the legion and stood on the second line in battles behind the Hastaii
Princeps posterior The deputy to a Princeps prior
Signifer The standard bearer for the century in a legion
Singulares The auxiliary soldiers
Trarii Experienced soldiers, who used the same weapons as the Hastaii and Principes, but instead of a pilum, they had a long spear.
Tribunus One of six assistants to a legion commander - the Primus Pilus. Usually a young senator learning the basics for his career
Tribunus laticlavius The second in command in a legion
Velites The light soldiers. Unlike the Hastaii, they did not have full armour, although they did have a helmet and a shield. They were also armed with a sword, but had a only a short javelin as opposed to a pilum.