| creak |
a grating or squeaking sound, as of unlubricated machinery parts rubbing against each other. [1/3 definitions] |
| crisscross |
with two or more lines crossing each other. [2/6 definitions] |
| cross-eye |
a condition in which one or both eyes turn toward each other. (See strabismus.) |
| demolition derby |
a series of sporting contests in which old automobiles are repeatedly crashed into each other until only one can still move. |
| diaphragm |
any of various membranes that serve to separate two areas from each other. [1/5 definitions] |
| dichloride |
a chemical compound that contains two atoms of chlorine for each other element or group. (See bichloride.) |
| Doppler effect |
the apparent shift in frequency of waves, as of sound or light, if the source and receptor are in motion relative to each other. The frequency appears to become greater if they move closer and become less if they move apart. |
| do-si-do |
a movement in square dancing in which two dancers approach each other, pass around each other back to back, and return to their original positions. [1/4 definitions] |
| double-breasted |
having the sides overlap each other by a wide margin on the breast or front, and usu. having a double vertical row of buttons, as a jacket or coat. (Cf. single-breasted.) [1/2 definitions] |
| double-reed |
of, pertaining to, or designating any woodwind instrument that sounds by means of a pair of reeds that vibrate against each other. [1/2 definitions] |
| duel |
any contest pitting two people, factions, or concepts against each other. [1/3 definitions] |
| duo |
two people who habitually associate with each other; couple. [1/3 definitions] |
| eclipsing binary |
two stars that orbit a common center of gravity and periodically move in front of each other, causing a fluctuating magnitude. |
| ecosystem |
a community of living things that interact with each other for their survival, together with their surrounding environment. |
| enmity |
the mutual feeling of enemies toward each other; hatred; hostility; antagonism. |
| equilibrium |
a state in which all acting forces cancel each other to create balance or stability. [1/3 definitions] |
| extended family |
a large group of relatives related by blood, marriage, or adoption who compose a single household or live close to each other. [2 definitions] |
| eye contact |
the act of two people looking at each other's eyes. |
| face to face |
in the presence of each other; in person. |
| fornication |
voluntary sexual relations between a man and woman not married to each other. |
| French kiss |
a kiss in which the partners' tongues enter each other's mouths; soul kiss. |