εἶδος
eîdos
“form, shape”
22 words in English grow from this root.
Adenoid
Medicineἀδήνadḗn
“gland shaped”
Android
Scienceἀνδρο-andro-
“man-shaped”
Asteroid
Earthἀστήρastḗr
“star-shaped”
Colloid
Scienceκόλλαkólla
“glue-like”
Deltoid
Medicineδέλταdélta
“delta shaped”
Ethmoid
Medicineἠθμόςēthmós
“sieve-shaped”
Ganoid
Natureγάνοςgános
“shining in form”
Geode
Earthγῆgê
“earth-like”
Geoid
Earthγῆgê
“earth shaped”
Hyoid
Medicineὗhŷ
“upsilon shaped”
Idyll
Artεἰδύλλιονeidúllion
“little form, small picture”
Kaleidoscope
Everydayκαλόςkalós
“beautiful-form viewer”
Mastoid
Medicineμαστόςmastós
“breast shaped”
Metalloid
Scienceμέταλλονmétallon
“metal-shaped”
Meteoroid
Earthμετέωροςmetéōros
“shaped like a thing aloft”
Monoid
Numberμόνοςmónos
“single-form thing”
Nematode
Natureνῆμαnêma
“thread-shaped”
Solenoid
Scienceσωλήνsōlḗn
“pipe-shaped thing”
Sphenoid
Medicineσφήνsphḗn
“wedge shaped”
Steroid
Scienceστερεόςstereós
“solid-shaped”
Thyroid
Medicineθυρεόςthyreós
“shield-shaped”
Trapezoid
Numberτράπεζαtrápeza
“table-shaped”