| Subject | English | Irish |
| health. | acute disseminated histiocytosis X | galar Letterer-Siwe |
| market. | due within X days | le haibíochtaí suas go X lá |
| market. | due within X days | dlite laistigh de X lá |
| health. | Fra-X syndrome | siondróm an X-chrómasóim leochailigh |
| health. | fragile x chromosome syndrome | siondróm an X-chrómasóim leochailigh |
| health. | fragile X syndrome | siondróm an X-chrómasóim leochailigh |
| health., med. | histiocytosis X | histicíotóis chealla Langerhans |
| health., med. | histiocytosis X syndrome | histicíotóis chealla Langerhans |
| comp., MS | IEEE 802.1X security standard | caighdeán slándála IEEE 802.1x (An Institute of Electrical and Electronics Engineers (IEEE) standard that defines port-based network access control which either allows or denies connection requests to IEEE 802.3 wired Ethernet networks or IEEE 802.11 wireless networks) |
| life.sc. | inverted X-chromosome | X-chrómasóm aisiompaithe |
| tech., nucl.phys. | medical X-ray equipment | trealamh míochaine x-ghathach |
| econ., market. | net profit declared by "x" | glanbhrabús fógartha ag... |
| econ., market. | net profit declared by "x" | brabús glan fógartha ag... |
| health. | nodular non-X histiocytosis | histicíotóis bhrúchtach ghinearálaithe |
| health., med. | triple X syndrome | siondróm X triarach |
| health., med. | trisomy X | siondróm X triarach |
| market. | with maturities up to X days | dlite laistigh de X lá |
| market. | with maturities up to X days | le haibíochtaí suas go X lá |
| comp., MS | x-axis | x-ais (The horizontal reference line on a grid, chart, or graph that has horizontal and vertical dimensions) |
| comp., MS | x axis | x-ais (The horizontal reference line on a grid, chart, or graph that has horizontal and vertical dimensions) |
| comp., MS | x-coordinate | x-chomhordanáid (The position of a point with reference to the x-axis, defined in conjunction with the y- and z-coordinates) |
| market., commun. | X-height | X-airde |
| environ. | X ray A penetrating electromagnetic radiation, usually generated by accelerating electrons to high velocity and suddenly stopping them by collision with a solid body, or by inner-shell transitions of atoms with atomic number greater than 10; their wavelength ranges from about 10(-5) angstrom to 10 angstroms, the average wavelength used in research being 1 angstrom | X-gha |
| environ. | X-ray diffraction analysis | anailís ar dhríaonadh x-ghathanna |
