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| 1 | X-axis | एक्स-अक्ष | Horizontal axis |
| 2 | X-ray | एक्स-रे | Radiograph, Roentgenogram |
| 3 | Xenon | जीनॉन | - (Chemical element, no synonym) |
| 4 | Xenophobia | ज़ेनोफ़ोबिया | Fear of strangers/foreigners |
| 5 | Xerography | जेरोग्राफी | Dry copying, Electrostatic copying |
| 6 | Xerophyte | जेरोफाइट | Desert plant, Drought-resistant plant |
| 7 | Xerox | ज़ेरॉक्स | Copy, Photocopy (used generically) |
| 8 | Xylophone | जाइलोफोन | Percussion instrument |
| 9 | Xenolith | ज़ेनोलिथ | Foreign rock |
| 10 | Xylem | जाइलम | Plant tissue |
| 11 | Xenocryst | ज़ेनोक्रिस्ट | Foreign crystal |
| 12 | Xanthan | ज़ैंथन | Polysaccharide gum |
| 13 | Xanthophyll | ज़ैंथोफिल | Yellow pigment in plants |
| 14 | Xeroderma | ज़ेरोडर्मा | Dry skin |
| 15 | Xerostomia | ज़ेरोस्टोमिया | Dry mouth |
| 16 | Xiphoid | ज़िफ़ॉयड | Sword-shaped |
| 17 | Xenogeneic | ज़ेनोजेनिक | Derived from a different species |
| 18 | Xerophilous | ज़ेरोफिलस | Thriving in a dry environment |
| 19 | Xerosis | ज़ेरोसिस | Abnormal dryness |
| 20 | Xenotransplantation | ज़ेनोट्रांसप्लांटेशन | Transplant from another species |
| 21 | X-factor | एक्स-फैक्टर | Special trait, Unnamed factor |
| 22 | Xenograft | ज़ेनोग्राफ्ट | Tissue transplant from another species |
| 23 | Xylan | ज़ाइलन | Polysaccharide found in plant cell walls |
| 24 | Xyst | ज़िस्ट | Ancient Greek covered portico |
| 25 | Xanthoma | ज़ैंथोमा | Yellow skin growth |