2
matches in the perceptible to the eye
USA: pəː·se'ptʌ·bʌ·l tʌ· ðiː· aɪ' UK: pəseptəbl tuː ðiː aɪ

0
perceptible to the naked eye
USA: pəː·se'ptʌ·bʌ·l tʌ· ðiː· neɪ'kʌ·d aɪ' UK: pəseptəbl tuː ðiː neɪkɪd aɪ

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