| NYCHTHEMERAL | • nychthemeral adj. Lasting a nychthemeron (24 hours). • NYCHTHEMERAL adj. (Greek) of or relating to a nychthemeron or 24-hour period. |
| NYCHTHEMERON | • nychthemeron n. A period of one day and one night, a date: in the West, this is a period of 24 consecutive hours. • NYCHTHEMERON n. (Greek) a full period of a day and night. |
| NYCHTHEMERONS | • nychthemerons n. Plural of nychthemeron. • NYCHTHEMERON n. (Greek) a full period of a day and night. |
| NYCTAGINACEOUS | • nyctaginaceous adj. (Botany) Belonging to the family Nyctaginaceae of flowering plants. • NYCTAGINACEOUS adj. belonging to the Nyctaginaceae, a family of mainly tropical American plants, including bougainvillea. |
| NYCTALOPE | • NYCTALOPE n. (Greek) one afflicted with nyctalopia, the condition of seeing poorly at night or in partial darkness, while the day sight is normal; erroneously, the opposite condition, also NYCTALOPS. |
| NYCTALOPES | • nyctalopes n. Plural of nyctalops. • NYCTALOPS n. (Greek) one afflicted with nyctalopia, the condition of seeing poorly at night or in partial darkness, while the day sight is normal; erroneously, the opposite condition. |
| NYCTALOPIA | • nyctalopia n. (Medicine) The inability to see clearly in dim light; night blindness. • NYCTALOPIA n. reduced visual capacity in faint light (as at night), night blindness. |
| NYCTALOPIAS | • nyctalopias n. Plural of nyctalopia. • NYCTALOPIA n. reduced visual capacity in faint light (as at night), night blindness. |
| NYCTALOPIC | • nyctalopic adj. (Medicine) Unable to see clearly in low light; night-blind; suffering from nyctalopia. • NYCTALOPIC adj. suffering from nyctalopia, night blindness. |
| NYCTALOPS | • nyctalops n. A person who has nyctalopia, night blindness. • NYCTALOPS n. (Greek) one afflicted with nyctalopia, the condition of seeing poorly at night or in partial darkness, while the day sight is normal; erroneously, the opposite condition. |
| NYCTANTHOUS | • NYCTANTHOUS adj. flowering at night. |
| NYCTINASTIC | • nyctinastic adj. Relating to nyctinasty, the movement of leaves or petals in response to darkness. • NYCTINASTIC adj. relating to nyctinasty, sleep-movement in plants. |
| NYCTINASTIES | • NYCTINASTY n. sleep-movement in plants, e.g. the closing of petals. |
| NYCTINASTY | • nyctinasty n. (Botany) The movement of leaves or petals in response to darkness; the closing of a flower at night. • NYCTINASTY n. sleep-movement in plants, e.g. the closing of petals. |
| NYCTITROPIC | • nyctitropic adj. (Botany) Turning or bending at night into special positions. • NYCTITROPIC adj. showing nyctitropism. |
| NYCTITROPISM | • nyctitropism n. (Botany) Synonym of nyctinasty. • NYCTITROPISM n. the assumption by plants of certain positions at night, esp. ones different from daytime positions. |
| NYCTITROPISMS | • NYCTITROPISM n. the assumption by plants of certain positions at night, esp. ones different from daytime positions. |
| NYCTOPHOBIA | • nyctophobia n. A fear of the night, nighttime, or darkness. • NYCTOPHOBIA n. an irrational fear of the night or darkness. |
| NYCTOPHOBIAS | • NYCTOPHOBIA n. an irrational fear of the night or darkness. |
| NYCTOPHOBIC | • nyctophobic adj. Afflicted with nyctophobia; fearful of the dark or of night. • NYCTOPHOBIC adj. suffering from nyctophobia, an irrational fear of the night. |