The Spanish word 'astrolabio' (astrolabe) comes from Ancient Greek 'ἀστρολάβιον' (astrolabion), meaning 'instrument for measuring stars'. This Greek word was formed from 'ἀστρολάβος' (astrolabos), literally meaning 'star-catching', which itself was a compound of two Greek words: 'ἀστήρ' (aster) meaning 'star' and 'λαμβάνειν' (lambanein) meaning 'to take or grasp'. The name perfectly describes the purpose of this ancient astronomical instrument, which was used to measure the positions of stars and planets.

Some related Spanish words include 'astro' (celestial body), 'astronomía' (astronomy), and 'asteroide' (asteroid). All these words share the same Greek root 'ἀστήρ' (aster) meaning 'star', making it easier to remember their connection to celestial objects and astronomy.

English speakers might recognize the connection to several familiar words: 'aster' (the flower named for its star-like shape), 'asteroid' (star-like celestial body), 'astronomy' (study of stars and celestial objects), and even 'astrology' (the study of stars' supposed influence on human affairs). The 'astro-' prefix in all these words comes from the same Greek root 'ἀστήρ' (aster) meaning 'star'.